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

When you do not want to use the default category then use the custom category. Custom categories should use the package name as a prefix, to ensure that they are unique. Some information is provided on below link:
http://developer.android.com/guide/topics/manifest/category-element.html Check the below link it has somewhat same question:
Android custom categories