Many sources, let me categorize in two way’s one of is SEO and another is SMO

The purpose of SEO: The main aim of Search Engine Optimization is to get more targeted visitors to your website which will increase the growth of the business. White hat SEO and some natural practices which help the website to get quality ranking results. The majority of the website will place on the 1st page of Google, Yahoo, and Bing. The purpose of SMO: SMO refer for gaining traffic, brand promotion or attention through social media website like Facebook, Twitter, and LinkedIn etc. SMO is the best way to drive traffic to the website instantly! All Social Media websites have different features, some of the websites only allow you to share Images, some website allows Videos. for more detailed info visit here