What are the differences between the different formats?

[sojuo]

What is the difference between these different formats? What is the impact on storage space and traffic consumption?

[InfinityLoop1308]

WebM generally has higher quality and use more data comparing to m4a/mp4. 3gp is no longer used.

[sojuo]

WebM generally has higher quality and use more data comparing to m4a/mp4. 3gp is no longer used.

That is, WebM consumes the most resources when transferring exactly the same screen?
Also which one consumes less resources, MPEG-4 or 3GP, when transferring the same content?