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1. Keep your DSpace up to date. We are constantly adding new indexing improvements in new releases
2. Ensure your DSpace is visible to search engines.

3. Ensure your proxy is passing X-Forwarded headers to the User Interface

4. Ensure the user interface is using server-side rendering (enabled by default)
5. Ensure the sitemaps feature is enabled. (enabled by default)
6. Ensure your robots.txt allows access to item "splash" pages and full text.
7. Ensure item metadata appears in HTML headers correctly.
8. Avoid redirecting file downloads to Item landing pages
9. Turn OFF any generation of PDF cover pages
10. As an aside, it's worth noting that OAI-PMH is generally not useful to search engines.  OAI-PMH has its own uses, but do not expect search engines to use it.

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• Google: http://www.google.com/addurl
• Yahoo: http://siteexplorer.search.yahoo.com/submit
• Bing: http://www.bing.com/docs/submit.aspx

Ensure your proxy is passing X-Forwarded

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headers to the User Interface

Some HTML tags important for SEO, such as the "citation_pdf_url" tag, require the full URL of your site.  The DSpace user interface will automatically attempt to "discover" that URL using HTTP Headers. 

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