Use a 301 redirect to direct traffic from the alternative domain (example2.org) to your
preferred domain (example.com). This tells Google to always look for your content in one
location, and is the best way to ensure that Google (and other search engines) can crawl
and index your site correctly. Ranking signals (such as PageRank or incoming links) will
be passed appropriately across 301 redirects. If you're changing domains, read about the
best practices for making the move.