Announcement
On Thursday, December 26, 2019, Niantic announced edits can now be made to existing PokeStops and Gyms.
Titles, descriptions, and photos can now be changed through a new system that allows players to suggest improvements to the points of interest.
To suggest improvements, click on a PokeStop and then click on the photo disc. After that, touch the top right corner of the screen with the three dots and it will show a screen to suggest changes to the stop.