On your athlete profile, it is important to list events you are attending so a coach knows where they can watch you play.
Recruiting showcases / tournaments are a major part of your college search and recruiting process.
What is important to understand, however, is that they are just a piece of your process. When you think about a recruiting event, you should think of the event as an opportunity to be seen by college coaches who already know about you, but want to see you play live.
They know about you because you sent them a quick message introducing yourself and inviting them to view your profile and video. You are on their radar.