The page that appears with organic and paid results after someone enters a search query in a search engine. A SERP may have paid ads, websites, image packs, video carousels, featured snippets, People also ask, knowledge panels, local packs, and more depending on the search query and a users search intent.
SEO involves keyword research and content creation. The goal of SEO is to rank high on search engines for your targeted keywords. For many searches, there are only 8-10 organic listings. Businesses need to be on the first page for their targeted keywords and it's important to be in the first organic listing to maximize organic traffic.
Consistently creating great content & pages that solve for the search intent of your targeted keywords. Keep content relevant and up to date and make sure you are using best practices for on-page SEO. Ensure your website has no technical issues and provide a great user experience. Last but not least, build backlinks from other websites.