In most cases, the correct metadata and artwork will be found automatically. However, if there are similar titles available then manual corrections may be required.
Making Manual Corrections
Step 1: Open the details page for the incorrectly matched item.
Step 2: Select the Edit Metadata option from the 3 dots menu in the upper right corner (on Apple TV this is displayed near Play button).
Step 3: Select the correct title from the list of matches (use the Search box if no suitable matches are found).
When correcting an entry for a TV show, only a single episode file will need to be changed. All episodes in the series will then be matched automatically.