What does the "Agenda: Add this page to agenda project" item in the right hand side menu do?

By mistake, I clicked on that item on the right side menu. I’m not sure what happens. I looked for an “Agenda” page but that doesn’t exist. I checked my TODO page but nothing again. Do I need to worry?

This is part of the plugin logseq-plugin-agenda which you apparently installed, its available in the marketplace, see also GitHub - haydenull/logseq-plugin-agenda: A calendar for logseq and the instruction manual: Introduction | Logseq Plugin Agenda

It adds the current page with its tasks as project

Oh yes, I just noticed. Thanks for the input. I had forgotten about that plugin.