Go to your profile page by tapping on your avatar, then scroll down to find your showcase!

showcase example

Your showcase is your inventory, where you can tap on items to read their description or tap and hold to Star them! Starring an item means it will show up first on your profile screen so other players can see your most valuable items!

Searching your Showcase

You can search for specific items in your showcase or filter by item type at the top.
At the bottom left you can add additional filters to sort your showcase by Recently Acquired, Stats, Extra Credit Value, and A to Z!  If you tap the arrow at the bottom right you can reverse the sort order.