You should not use social media to boost your site's keywords ranking on the SERP. The best method to increase your keywords is by getting dofollow keyword anchored backlinks from high DA sites. You can do guest posting to do that.
Social media websites are helpful to promote your website and gain traffic for it. They do not help to rank keywords for your website in search engines.
Social media is good for traffic and link building is for keyword ranking. You can add keyword on your post to get more traffic on that target keywords ...
Hi,
Social media platforms only help in promoting your website along with gaining traffic. It doesn't help in website keyword ranking in search engines.