In order to show up in search results, your content needs to first be visible to search engines. It's arguably the most important piece of the SEO puzzle: If your site can't be found, there's no way you'll ever show up in the SERPs (Search Engine Results Page).
Finally, boost your website’s popularity by building external links to your website and getting people to talk about your content on social media.
If you want your site to show up in the search results at all, then it needs to be indexed.
However, you don’t want your site to be indexed just once. You want the search engines to keep re-indexing your site.