What resolution should my have photos?

[Rosewebstudio]

In case you didn’t see this about glide and images

Does glide download the image url or just display it?

Neither. Glide heavily caches your images and optimizes them per device, changing their format and resolution to load optimally for each operating system and screen density. I’m guessing that you’re asking because you’ve updated an image and it’s not updating in your app. If so, please see How can I cause my images to update whenever they change?

If you really want to reduce the size of images there are plenty of optimisation sites out on the web for you to use - I’m sure your aware of this.

There are some great image resources here https://www.heyb3.com/resources/glide-app-resources