There are plenty of tools in the market. Which Keyword Tool you use more often?
Google keyword planner is the best free tool for high quality keyword research. They help to provide various keyword suggestions for your domain, and selecting the right keywords will help to rank your website higher in search results.
Google Keyword Planner
Semrush
Google Adword Keyword Tool and Google Trendz are the most famous popular keywords tools which are more often used in SEO.
SEmrush and Wordtracker are my favorite ones.
Google keyword planner isn't good anymore. So we use SEMrush keyword tool.