Step 2: Click + Add Redirect to define a new redirect
From - the relative path of the URL on the old website. Examples:
/home/index.htm
/sheriff/adc/index.htm
To - the page on the new site. Will be translated to the internal node reference if a URL alias is used. Examples:
<front>
/government/leadership/sheriffs-office/sheriffs-office-divisions/detention-services
Enabled - checked if the redirect should be active
Advanced Options > Redirect Status - 301 Moved permanently is the default option and should be chosen for pages that have changed location.