SMO doesn’t impact SEO or website rank directly as there is “no follow” applied, however indirectly if you are getting genuine traffic via social media and content is relevant to the concerned keywords then Google may reward you with a better rank.
It helps in SEO in such a way that SMO drives social media users to a website and therefore it increases website traffic and helps in improve website rank on search engine.
Social media do not help in ranking keywords in search engines. It is the process of optimizing your website in various social media websites. It helps to promote your website in various social networking websites to build traffic and also build your business popularity in search engines.