Provide full functionality on all devices. Mobile users expect the same functionality - such as commenting and check-out - and content on mobile as well as on all other devices that your website supports. In addition to textual content, make sure that all important images and videos are embedded and accessible on mobile devices. For search engines, provide all structured data and other metadata - such as titles, descriptions, link-elements, and other meta-tags - on all versions of the pages.
Meta tags. Meta tags still play a vital role in SEO. If you type any keyword into a search engine, you’ll see how that keyword is reflected in the title for that page. Google looks at your page title as a signal of relevance for that keyword. The same holds true for the description of that page. (Don't worry about the keyword title tag -- Google has publicly said that it doesn't pay attention to that tag, since it has been abused by webmasters and all those trying to rank for certain keywords.)
Thank you so much for these great SEO techniques you posted on your blog. I also follow you on your youtube and listened to almost all of your videos and sometimes I re-listen just to refresh my mind. Because of your techniques, we managed to bring our website to the first pages within a month. Adding external links was something I never imagined that it would work. But it seems like it is working. Anyway, please accept my personal thank you for coming up with and sharing these techniques. I look forward to your new blog posts and youtube videos!