If you have a transaction that has been stuck in the pending state for awhile, or if you want the transaction to complete sooner, then you can easily speed it up within the app.
The way this works is the wallet will send another transaction that replaces the original one.
Step 1: Navigate to the transaction history screen and tap on the pending transaction
Step 2: Select the "Speed Up" option
Step 3: Finish by tapping the "Confirm" button