Are you aware of the 'On-Page SEO' on your website?

On-page SEO is the practice of optimising individual webpages in order to rank higher and earn more relevant traffic in search engines.

On-Page SEO includes (but not limited to): Meta Robots tag, Robots.txt, including your URL in your sitemap, internal links on each of your pages, having an SSL installed, Heading Tags, Page Titles and Meta Descriptions.