Texture resolutions

Unity Engine
1

For my 2D game I will be using a png file for my background terrain.
What sort of resolution should i save the image out, is it best to save it out at a really high resolution as the target devices for the game is iOS devices and android devices and with android there is a bigger variety of resolution in comparison to iOS

Thanks

2

Bumpity

3

You have to ask your self : what devices / resolutions do i like to support, and so you can test it in the editor what looks good for this resolutions.