It can lead to future recruiting opportunities, but there is no automatic conversion from Keep in Touch to interview.

The value is that you have an existing relationship and a reason to re-engage. The Keep in Touch guide explains how to use that without overreading it.

Keep improving the underlying profile. If you return later with stronger experience, a new degree, or a clearer fit for an open role, the prior relationship can help create context.

I eventually got another interview, but I had also added two years of strong experience by then.

It's not nothing, but I wouldn't plan your career around it.