SEO(search engine optimization) mainly work on two part on page and off page both are very important for good seo.
Probably you didn't heard about whole-page optimization. We can also improve website rankings or Good SEO with proper onsite optimization alone. I seen many websites ranked on Top of Google with ZERO backlinks.
Yes, I totally agree with you .. Some Google search results shocked .. That time what is important SEO or other ?? Some Google results having which have no meta tags but they are on top..
yes i also see that, but do not know how they can do that is juts because they have old domain and do good at social?