Just as with any keyword research tool for any type of platform, you are probably going to get a ton of keywords returned. How you use them in your Amazon listing is determined by your strategy. You don't need to use all of the keywords in your listing. However, it is always recommended that you follow listing optimization best practices for Amazon and use the keywords accordingly.
Here are some of the most current Amazon Listing Optimization Training videos: https://www.youtube.com/results?search_query=amazon+listing+optimization
Genrally we suggest putting the most high traffic, low competition, and most relevant keywords in your listing.