Off-site SEO is therefore all the link building and marketing techniques you employ outside the context of your own website.

These include (but are not limited to):

Link building; back-linking and inbound

Press releases and other media articles that directly reference your website

Any article directory submissions you have made

Competitor analysis

Your social media posts and related marketing

Keyword analysis – the popularity and accuracy of your keywords

Leaving comments and links on other sites, blogs, forums, and videos

Submissions to SEO-friendly directories

Videos placed on sites like YouTube, properly optimized

RSS feeds

AdWords and other paid keyword campaigns

Trackbacks.