Good Domain Authority(DA) Sites are qualitative sites that have a high search engine reputation and usually have a DA score of above 40. Posting presentations in these sites transfers a lot of link equity to your site and it is very valuable in SEO campaigns. Examples of such sites include SlideShare (now LinkedIn SlideShare) and Issuu which have huge audience and search engines credibility. This may increase the search engine rankings of your website, develop high-quality backlinks, and strengthen DA by submitting your presentations.