The original Google algorithm was called PageRank, named after inventor Larry Page (though, fittingly, the algorithm does rank web pages).
After 17 years of work by many software engineers, researchers, and statisticians, Google search uses algorithms upon algorithms upon algorithms.
- The various components used by Google Search are all proprietary, but most of the code is written in C++.
- Google Search has a number of technical explications on how search works and this is also the limit as to what can be shared publicly.
- https://abseil.io and GogleTest https://google.github.io/googletest/ are the main open source Google C++ libraries, those are extensively used for Search.
- https://bazel.build is an other open source framework which is heavily used all across Google including for Search.
- Google has general information on you, the kinds of things you might like, the sites you frequent, etc. When it fetches search results, they get ranked, and this personal info is used to adjust the rankings, resulting in different search results for each user.
How does Google’s indexing algorithm (so it can do things like fuzzy string matching) technically structure its index?
- There is no single technique that works.
- At a basic level, all search engines have something like an inverted index, so you can look up words and associated documents. There may also be a forward index.
- One way of constructing such an index is by stemming words. Stemming is done with an algorithm than boils down words to their basic root. The most famous stemming algorithm is the Porter stemmer.
- However, there are other approaches. One is to build n-grams, sequences of n letters, so that you can do partial matching. You often would choose multiple n’s, and thus have multiple indexes, since some n-letter combinations are common (e.g., “th”) for small n’s, but larger values of n undermine the intent.
- don’t know that we can say “nothing absolute is known”. Look at misspellings. Google can resolve a lot of them. This isn’t surprising; we’ve had spellcheckers for at least 40 years. However, the less common a misspelling, the harder it is for Google to catch.
- One cool thing about Google is that they have been studying and collecting data on searches for more than 20 years. I don’t mean that they have been studying searching or search engines (although they have been), but that they have been studying how people search. They process several billion search queries each day. They have developed models of what people really want, which often isn’t what they say they want. That’s why they track every click you make on search results… well, that and the fact that they want to build effective models for ad placement.
Each year, Google changes its search algorithm around 500–600 times. While most of these changes are minor, Google occasionally rolls out a “major” algorithmic update (such as Google Panda and Google Penguin) that affects search results in significant ways.
For search marketers, knowing the dates of these Google updates can help explain changes in rankings and organic website traffic and ultimately improve search engine optimization. Below, we’ve listed the major algorithmic changes that have had the biggest impact on search.
It took a starting page and added all the unique (if the word occurred more than once on the page, it was only counted once) words on the page to the index or incremented the index count if it was already in the index.
The page was indexed by the number of references the algorithm found to the specific page. So each time the system found a link to the page on a newly discovered page, the page count was incremented.
When you did a search, the system would identify all the pages with those words on it and show you the ones that had the most links to them.
As people searched and visited pages from the search results, Google would also track the pages that people would click to from the search page. Those that people clicked would also be identified as a better quality match for that set of search terms. If the person quickly came back to the search page and clicked another link, the match quality would be reduced.
Now, Google is using natural language processing, a method of trying to guess what the user really wants. From that it it finds similar words that might give a better set of results based on searches done by millions of other people like you. It might assume that you really meant this other word instead of the word you used in your search terms. It might just give you matches in the list with those other words as well as the words you provided.
It really all boils down to the fact that Google has been monitoring a lot of people doing searches for a very long time. It has a huge list of websites and search terms that have done the job for a lot of people.
There are a lot of proprietary algorithms, but the real magic is that they’ve been watching you and everyone else for a very long time.
What programming language powers Google’s search engine core?
C++, mostly. There are little bits in other languages, but the core of both the indexing system and the serving system is C++.
How does Google handle the technical aspect of fuzzy matching? How is the index implemented for that?
- With n-grams and word stemming. And correcting bad written words. N-grams for partial matching anything.
Use a ping service. Ping services can speed up your indexing process.
- Search Google for “pingmylinks”
- Click on the “add url” in the upper left corner.
- Submit your website and make sure to use all the submission tools and your site should be indexed within hours.
Our ranking algorithm simply doesn’t rank google.com highly for the query “search engine.” There is not a single, simple reason why this is the case. If I had to guess, I would say that people who type “search engine” into Google are usually looking for general information about search engines or about alternative search engines, and neither query is well-answered by listing google.com.
To be clear, we have never manually altered the search results for this (or any other) specific query.
The basic idea is using an inverted index. This means for each word keeping a list of documents on the web that contain it.
Responding to a query corresponds to retrieval of the matching documents (This is basically done by intersecting the lists for the corresponding query words), processing the documents (extracting quality signals corresponding to the doc, query pair), ranking the documents (using document quality signals like Page Rank and query signals and query/doc signals) then returning the top 10 documents.
Here are some tricks for doing the retrieval part efficiently:
– distribute the whole thing over thousands and thousands of machines
– do it in memory
– looking first at the query word with the shortest document list
– keeping the documents in the list in reverse PageRank order so that we can stop early once we find enough good quality matches
– keep lists for pairs of words that occur frequently together
– shard by document id, this way the load is somewhat evenly distributed and the intersection is done in parallel
– compress messages that are sent across the network
Jeff Dean in this great talk explains quite a few bits of the internal Google infrastructure. He mentions a few of the previous ideas in the talk.
He goes through the evolution of the Google Search Serving Design and through MapReduce while giving general advice about building large scale systems.
As for complexity, it’s pretty hard to analyze because of all the moving parts, but Jeff mentions that the the latency per query is about 0.2 s and that each query touches on average 1000 computers.
If Lemoine’s claims are true, it would be a milestone in the history of humankind and technological development.
Google strongly denies LaMDA has any sentient capacity.
- Google playby /u/WEEEBBER9999 (Google) on June 26, 2022 at 4:44 am
Google ALWAYS has to muck things up Where did Google hide the apps I have not installed. I am trying to find an app I used before but I cannot because my library only list the ones I already have on my device. submitted by /u/WEEEBBER9999 [link] [comments]
- Get more accurate search result on Google Searchby Liang Jie Ng (Google Search on Medium) on June 26, 2022 at 3:26 am
Tips to improve your search on Google Search. With this 3 tips, they can save you a lot of time on going page by page to find your answer.Continue reading on Medium »
- Google Pixel 7 roll outby /u/Helen_Magnus_ (Google) on June 26, 2022 at 1:40 am
What's the likelihood in the next Google roll out they're going to release a phone smaller than the Google Pixel 6? I have a google pixel 3 and I'd love to buy another google phone. But I'm not willing to go to a large size phone submitted by /u/Helen_Magnus_ [link] [comments]
- soo my school deleted the email acc they gave me, but these two stupid notifications won't go, I alrdy tried restarting and obv swiping, pls helpby /u/TaNaYsHaH9737 (Google) on June 25, 2022 at 7:47 pm
submitted by /u/TaNaYsHaH9737 [link] [comments]
- Updating Google search resultsby /u/eznoh (Google) on June 25, 2022 at 7:41 pm
Does anyone know of way to update google search results. It always returns link to one of my website's sub-pages and not the main page. I've used the feedback at the bottom to highlight the error but it hasn't worked, I've been trying for a couple years. submitted by /u/eznoh [link] [comments]
- CAPTCHAS not showing up.by /u/3nv13d (Google) on June 25, 2022 at 7:29 pm
I've updated chrome, cleared the cache, restarted my computer and it still isn't showing up. https://preview.redd.it/54xzj53pjt791.png?width=635&format=png&auto=webp&s=8c50dfd9b9292e2f78ac6d2238370f48174fbd1a submitted by /u/3nv13d [link] [comments]
- my phone numberby /u/Old_Day5444 (Google) on June 25, 2022 at 12:32 pm
submitted by /u/Old_Day5444 [link] [comments]
- google llc keeps throwing chrome and asking for update, but my updates are full.by /u/Racist_hunter69 (Google) on June 25, 2022 at 8:08 am
submitted by /u/Racist_hunter69 [link] [comments]
- My YouTube stops working for sometime like 4to5 times a day it works again after like 15 minutes or after I restart my phone my Google search also stops workingby /u/Drift775 (Google) on June 25, 2022 at 8:02 am
ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ submitted by /u/Drift775 [link] [comments]
- The Open Secret of Google Searchby /u/HotSession8535 (Google) on June 25, 2022 at 5:06 am
submitted by /u/HotSession8535 [link] [comments]
- 🙁by /u/Jackie_The_Idiot (Google) on June 25, 2022 at 3:25 am
The thing on the google page is so sad 🙁 submitted by /u/Jackie_The_Idiot [link] [comments]
- Why is this coming up.it’s only on my phone I use my google account and the captcha isn’t even working.....it just keeps coming up again;by /u/enunciateyourself (Google) on June 25, 2022 at 12:53 am
submitted by /u/enunciateyourself [link] [comments]
- Warning! Don't upgrade your nest account. You will lose features!by /u/jpro1001 (Google) on June 25, 2022 at 12:20 am
I had a nest account for the first google doorbell. I wanted to share doorbell access with a relative that has a Google home account of their own. To do that I had to upgrade my nest account to a Google account. After I did that I don't have constant video recording anymore. I have their new 'event recording'. This doesn't record constantly so if something moves I might not see what precluded that or happened after. This is one of the features why I bought the nest doorbell in the first place. Google has a nest aware plus plan but it's $12 which is more than double of the $5 I was previously paying with my nest account. The upgrade process didn't make it clear that any of this would happen. I called Google support, but they said sorry there's nothing we can do for you. I at least assumed that they would give me a year of the plus plan or something as a consolation but nothing. I love Google products and I'm writing this on a pixel and have Google homes all over the house, but this has made me not trust them. I'm really upset and not recommending Google products to people anymore. submitted by /u/jpro1001 [link] [comments]
- Google Addby /u/Hure15 (Google) on June 24, 2022 at 11:33 pm
So i just recieved email from Google add and it says i owe them 100$,now if someone can help and explain what the flying F does this mean,i don't remember paying for adds anywhere nor i made purchase with my card.. however some time ago i got few bucks from google on my instagram page so i spent them for promoting my posts but that was it,i checked my card status and it's fine for now submitted by /u/Hure15 [link] [comments]
- Electric scooter purchase hack for Google employees (but works for anyone)by /u/orchard89 (Google) on June 24, 2022 at 8:39 pm
an electric scooter company that does subsidy programs / discounts on their products via a google partnership - as long as you enter a gmail.com domain you can actually get the $100 discount applied at checkout, it doesn't have to be google.com or alphabet, as of when I checked last an hour ago. Link here for code (they might end up changing it so no promises that it works: https://www.levyelectric.com/commuter-benefits/google) submitted by /u/orchard89 [link] [comments]
- Google sends alert about "Hermit" spyware on Android and iOS devicesby /u/Admirable_Baker (Google) on June 24, 2022 at 6:23 pm
https://www.cybertalk.org/2022/06/24/google-sends-alert-about-hermit-spyware-on-android-and-ios-devices/ submitted by /u/Admirable_Baker [link] [comments]
- Search bar historyby /u/UpbeatInstance1 (Google) on June 24, 2022 at 3:47 pm
When you click on the search bar in google it shows you your recent searches. Usually you would be able to delete them. For me before I could delete them but now no matter how many times I delete my searches, They always re appear when I close google and open it again. This started happening to me after one day I got a google pop up saying if I want to keep local search data. I was forced to press yes because if I pressed no it would re appear. Im pretty sure the pop up appeared because I was using my school account and the administrator changed something. So thats it. Please tell me if there is a way to fix this. Thanky you in advance submitted by /u/UpbeatInstance1 [link] [comments]
- So my google play store is broken, it happens on most of the apps and i cant download anything or updateby /u/Broxonus (Google) on June 24, 2022 at 3:24 pm
submitted by /u/Broxonus [link] [comments]
- update on my school banning me from using gmail: i somehow made a new gmail account at school even though the school blocks making new accountsby /u/pro-ace-simp (Google) on June 24, 2022 at 3:09 pm
submitted by /u/pro-ace-simp [link] [comments]
- Google Calendar - Accepting meeting from a secondary (none gmail address)by /u/ThinkCommunication (Google) on June 24, 2022 at 11:37 am
Currently I am forwarding work emails to an workspace address.... so my [email@example.com](mailto:firstname.lastname@example.org) goes to [email@example.com](mailto:firstname.lastname@example.org) this works nicely, set up my reply to email address to the companies domain as well as the companies smnp server. however when i get a meeting request, and i accept, it's showing twice on my colander , and my private address is being revealed. submitted by /u/ThinkCommunication [link] [comments]
- For a very very very long time (6M+) it's impossible to set new payment details after a failed payment. This happens in browser and play store app. All it says is "Error try again later". I don't even have the chance to type something in.by /u/basecatcherz (Google) on June 24, 2022 at 8:42 am
submitted by /u/basecatcherz [link] [comments]
- my school just banned me from using youtube or gmail (maybe because i was searching for the older will wood music)by /u/pro-ace-simp (Google) on June 23, 2022 at 6:33 pm
submitted by /u/pro-ace-simp [link] [comments]
- The Nooglerby /u/DCGMechanics (Google) on June 23, 2022 at 6:18 pm
submitted by /u/DCGMechanics [link] [comments]
- How long was this camera button been on the search page? (Pressing it opens the google app/App Store page for the google app)by /u/khaled (Google) on June 23, 2022 at 11:21 am
submitted by /u/khaled [link] [comments]
- Google just announced "Parti" - a text-to-image model co-developed with "Imagen"by /u/bartturner (Google) on June 23, 2022 at 10:40 am
submitted by /u/bartturner [link] [comments]
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Do you find your website being ranked lower and lower despite your best efforts to improve your google ranking? There is nothing more…Continue reading on Medium »
- Bruh what ain’t no wayby /u/Financial-Spite-8159 (Google) on June 22, 2022 at 2:14 pm
submitted by /u/Financial-Spite-8159 [link] [comments]
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