You may create redirects (previously referred to as an alias) in the CMS. Navigate to /admin > Content > Redirects & click the Create Redirect Button.
Add the desired URL slug, destination URL, and select the redirect type (Permanent or Temporary).
A permanent redirect (301) will tell Google to update their records with the new URL. A temporary redirect (302) will not impact SEO at all, but only use these if you intent to remove the redirect eventually.
Note: If you create a page using a slug that is set to redirect the redirect will no longer work.