There has always been a degree of guesswork involved in search engine optimization.
A lot of debate has occurred over the years regarding the impact of websites like Facebook, Twitter, and YouTube on the ranking of a website. It's still up for debate whether backlinks from social media are considered authoritative links.
Social media success and website success, however, are in direct correlation, which isn't exactly hard to find. Simply, the impact is subtler - a bit more indirect.
Get tips on how to boost your SEO rankings with social media. (https://www.rankwatch.com/blog/how-can-social-media-boost-your-seo-ranking/)