The Best Free SEO Tools.
There are literally hundreds of free SEO tools out there, so we want to focus
on only the best and most useful to add to your toolbox. Tons of people in the
SEO community helped vet the SEO software in this post (see the note at the end).
To be included, a tool had to meet three requirements. It must be:
1. Bing Webmaster Tools
While Google Webmaster Tools gets all the glory, folks forget that Bing Webmaster offers a full suite of website and search analytics. Especially useful are keyword reports, keyword research, and crawling data.
2. Data Studio
If you need to merge data from different sources (say Search Console and Google Analytics), visualize, and share it - this is Google Data Studio's comfort zone. For an idea of all the SEO tasks and dashboards that you can build for free, check out these Google Data Studio Resources from Lee Hurst.
3. Enhanced Google Analytics Annotations
How do you know if your dip in traffic (or rise) is associated with a Google Algorithm update, or perhaps a major holiday? This is a highly-recommended Google Chrome plugin that overlays additional data on top of your analytics, so you can easily send screenshots to clients showing exactly how outside forces impacted traffic.