A profile is the instrument Signature uses to share information about you with other applications. For example, if a department web page wanted to list you as a faculty member, you would receive a request in Signature, which you would accept or decline. If you accepted, you could then specify the information you wanted to share by choosing a Signature profile you created. The information in the selected Signature profile would be shared with the department web page.
In order to be listed on the Baylor website, you must have at least one Signature profile so that the data on that profile can populate your website bio.