The best feature of Gmail for Business (firstname.lastname@example.org) is that it's always getting better. Google is always adding ways to help us find what we're looking for. This year Google became the world's largest email provider. People love Gmail because it's simple yet powerful. You can now search email by size, more flexible date options and exact match. As always you can also combine operators.
Here's a great use case to find large emails and files in Gmail. This can help find large files in Gmail taking up a lot of storage that you might not need anymore. Below we're looking for emails larger than 10 megs and from more than 2 years ago.
Gmail has dozens of advanced search operators to check out. You can even create rules using Filters with Gmail's search operators to automatically delete, label, etc. certain types of messages.