Keyword rank tracking is an SEO best practice that provides visibility into the performance of your website in Google's search results. To monitor the positions of your keywords, you will need to purchase a good rank tracker and choose the right keywords for it to track.
Keyword tracking (or position tracking) is the process of monitoring how your web pages rank in Google's search results for your most important keywords. Google shares some of this data for free in the Google Search Console. Other rank tracking tools provide more advanced keyword tracking as a paid service.
Rank tracking is the practice of tracking where URLs rank on the search engine results pages for select keywords. The URLs are tracked over time in order to detect trends and to see the impact of SEO optimization.