If you would like to create vanity URLs for identifying traffic for marketing campaigns, below are the instructions:
Visit the Google Analytics Campaign URL Builder site and enter the details you wish to track. Be sure to select which version of Google Analytics you are using. If you're using a different analytics platform, please consult their support documentation for creating tracking links.
Navigate to Configuration > Search and metadata > URL Redirects.
Click the "Add redirect" button.
In the Path field, enter the vanity URL, and in the To field enter the Google Analytics Campaign URL. Click Save.
You will now see the redirect listed on the Redirects page.
If you wish to remove a redirect, click the dropdown by the Edit button and click Delete.