Source: http://searchengineland.com/definitive-seo-audit-part-1-3-technical-250541
The technical side is the first component to tackle when conducting an SEO audit or optimizing a new site. The following are key steps to consider for best results:
- Count how many of your pages are indexed by search engines.
- Inspect your robots.txt file to see if anything is blocking the search engines from indexing your pages.
- Make sure your preferred domains are 301 redirecting to a single page.
- Produce a human-readable sitemap aside from your XML sitemap.
- Hunt down and fix broken links.
- Look into using HTTPS when appropriate.
- Test your site’s mobile friendliness.
- Aim for a higher Google PageSpeed score.
- Improve your real page speed.
- Optimize your internal link structure.
- Repair broken internal links.
- Rewrite duplicate titles & descriptions.