Why Group Crashes?

A crash group lets you organize a set of call stacks using some level of the call stack hierarchy other than the top-most stack frame. Imagine you have the following three call stacks. By default, these would all be grouped using the top-most stack frame (stack key A), and you would have just one entry in the Summary page that grouped all three crashes.
A->B->C A->D->E A->F->G
If you set up a crash group at level 2, stack key A would no longer appear in the summary table. Instead, you would have three different groups displayed (B, D, and F).
Reports can be created by specifying a list of rules on the Settings page, or by expanding a stack frame on the Crash page and selecting Create Group. You can view the list of all your currently defined groups on the Groups page.
For more information on how to group reports please see our Grouping Crashes doc.