SEO
https://search.google.com/test/rich-results – check if your site support schema.
https://learningseo.io – Free SEO Tutorials.
Keyword Research Tools
- https://neilpatel.com/ubersuggest/
- Google Adwords Keyword tool
- https://keywordseverywhere.com/
- https://moz.com/explorer
- https://www.semrush.com/
- https://www.wincher.com/
- https://www.rankiq.com/
- https://www.getkeywords.io/
- https://questiondb.io/
- https://www.jaaxy.com/