I was invited to a baby shower and baby registry on the bottom of invite

Do I get a gift from the baby registry online or purchase whatever gift I want on my own? I just don’t know how baby registries work so if anyone can help me out! The link was on the bottom of the invite for her baby registry. When I click “give this gift” it says to put my name and email address so does this mean I put down my payment card info and purchase from said website or is it just a list I go off by and hand her the gift at her baby shower? Sorry I’m all new to this