The GSA is continuously crawling all website within all collections providing the freshest content possible. You will know that the GSA has visited your website by looking at your web server log files for the User Agent Name: govns-gsa2-crawler.
What is a collection?
What is my collection?
How do I add a site to a collection?
How do I request a new collection?
I updated my website but the GSA does not return it in the search result page.
What is the User Agent Name of the GSA?