The “Optimize" 'Metadata” section in the Keyword tool is entirely dedicated to the simulation of the final keywords selection after you made your keywords research.
At this stage, we recommend having selected about 30 keywords by “starring” them.
You can re-organize this table by clicking on “Display only starred keywords” (optional).
From there, select the keywords you would consider adding to your App Name, Subtile and iTunes Connect Keyword field (short and long description for Google Play). Try to select the most relevant keywords, with high KEIs or high Volume and potential good rankings.
You’ll actually get the “Global KEI” estimation, which is the addition of all selected keywords’ KEI together. Try to come up with the highest global KEI possible. Plus, thanks to the character counter, you will know when you reach the character limit.
No need to switch to another program anymore (Excel, Google Sheets, character counter, etc.) anymore, everything is in one place!