[CatOne]

If you assign a context to a project, then it will be the default context for all items created in that project (unless you manually specify another context). So it's helpful for that purpose.

In my context view perspectives, I have it set to display the project column, so I know what project they belong to. However, action groups are not visible in context mode in the same way they are in project mode, which can lead to the loss of some contextual information. There's a setting (under Data) to show projects and action groups in Context mode, but it doesn't behave as you'd think… it's displayed inline with the other items, and then only after all the sub-items have been completed.