What does “category” in the manifest mean?

Question

The documentation says you can specify a custom category.

• When, why and how would you do it?
• What would be the use of it?

Answer 1

http://developer.android.com/guide/topics/intents/intents-filters.html

Scroll down a bit and you should see a section under "Intent Objects"

They basically describe certain special properties of an activity. for example, adding

means that the app can be started on the phone's bootup