The landing page offers you a search box encompassing all of the genealogy collections on the site, which are considerable.
As the title indicates, you are working with indexes. If you want the records you can purchase them.
You have the option of searching any of the indexes individually. Click on the "Record Sets" tab at the top of the landing page to access them. The holdings cover a lot of ground such as records on mental health, paternity, criminals, birth/death/marriage, and more.