Profile Photos are pictures members can upload that will display in their public member profile and viewable when someone visits your profile page. In order to upload a photo this requires at least 15+ posts.
To do this, look for your username in the upper right-hand corner of every page. Click on it, then click Dashboard.
On the next screen, you will find the following options: (click on it)
Scroll and click the PROFILE PHOTO option. Follow the directions by entering either a URL address or upload from your computer, then click SAVE CHANGES.
If you are on mobile and want to make a change, look for ACCOUNT link.