While keeping up with Google search tests and layout changes is great, I don’t yet have any tools to track search engine updates or movement. The tools below all publicly share potential Google updates and track changes across thousands of SERPs. Typically they’re only looking at rankings shifts and not analyzing A/B tests or other layout changes everyday. I highly recommend you check out the following tools to learn when the SERPs are changing a lot or when updates are likely impacting the search results.
Personally, however, I’ve found that looking at these tools is only one factor to look at — even the largest toolsets cannot account for your particular layout and ranking factors that impact your websites or clients’ websites. Always be checking the SERPs that matter to you and pass along any shifts or updates that you see in testing or live in different verticals.
The team over at Moz track rankings movements across thousands of keywords and also track SERP elements like local map packs, in-depth articles and more.
SERPmetrics tracks changes across the US .com versions of Google and Bing.
Nothing public facing, but often shares their global index rank shifts on their Twitter profile.
A very visually simple search engine ranking tracker that shows shifts across 17,000+ keywords.
A newer tracking tool, this one is one of the few that allows for you to check for different changes by country and vertical like ecommerce, adult and more categories.