Google Algorithm Updates
For years I’ve kept a list of Google algorithm updates. Since I started this project there have been some other great resources and tools to help you keep on top changes at Google.
“Today we use more than 200 signals, including PageRank, to order websites, and we update these algorithms on a weekly basis. For example, we offer personalized search results based on your web history and location.” – Google
Google Algorithm Monitoring Tools
- MozCast - MozCast is a weather report showing turbulence in the Google algorithm over the previous day (or see the 5-day history on the left). The hotter and stormier the weather, the more Google’s rankings changed.
- serpmetrics flux charts - Here they monitor over 100k keywords on Google, Yahoo and Bing. Providing line charts representing the day-to-day fluctuations in the search results.
- Algoroo - Yet another Google SERP monitor. One unique feature is how they give you an idea of how much the month is different compared to the previous month.
Google Algorithm Update lists
- SEOmoz’s Google Algorithm Change History – This this goes all the way back to the year 2000. Here you will find a nicely organized list of changes Google has made over the years.
- Search Engine Round Table’s Google PageRank & Algorithm Updates – Search Engine Round Table is almost always first to announce changes to the Google algorithim. Here you will find a very long and detailed list of changes.
- Official Google Page: Inside Search – This is updated by Google and typically only lists UI changes. Google has also been providing monthly update lists on their official blog.
Hit by a Google Algorithm Update?
If you think you’ve been hit by a Google Algorithm update check one of the lists above and compare the date of the updates with your non-branded organic search engine traffic. If you want to check to see if another website was hit by a Google Algorithm update I recommend using SEMRush Trends and look at the number of competitive keywords the site has ranked for over the past few months. If you see a major drop it’s usually because the site was hit by an update or the site made a major change and didn’t properly execute to eliminate fluctuations in the rankings.