How to embed an interactive map with automatic updating of user inputs (their locations)?

I’ve looked around the forum and haven’t found a recent answer to this common issue.

As a newbie, I’m wondering if there’s a tutorial out there describing how to simply embed a map (Google) into an app and then allow for users to input their own location into the app from an input field while seeing markers of previous inputs from other users.

I have found the Embedded Map View (Beta) component, but I’m not sure how to use the “markers to render” variable.

Any help would be appreciated.