What is the best practice to publish and cache imageries or hard copies?

[JamalNUMAN]

What is the best practice to publish and cache imageries or hard copies?

I couldn’t figure out the pros and cons of publishing and caching of imageries or hard copies using:

Mosaic as a container

Group Layer as a container

rawan saleh‌

Saleh Ahmed‌

[JamalNUMAN]

Which is better: to get imageries contained in mosaic dataset to group layer?