Conversation so far:
what is flickr and how does it work
Flickr is a photo-sharing platform and social network where users upload photos for others to see.
What is a photo-sharing platform that is not Flickr?
Google Photos is a service that backs up your entire photo and video library for free.
does imgur provide the same service as google photos
Imgur is an image hosting and sharing site which hosts images for free in various formats.

Question: how are photos displayed on the services
Self-contained rewrite: how are photos displayed on image sharing services