SEO means Search Engine Optimization and is the process used to optimize a website's technical configuration, content relevance and link popularity so its pages can become easily findable, more relevant and popular towards user search queries, and as a consequence, search engines rank them better.
SEO enables you to get better ranking for your site on the web. When users search for products that are available on your website, they will be able to see it as soon as they type in the keywords. A higher ranking for your website will increase the possibility of your site getting more clicks.