SEO can be classified in various ways e.g. On-page SEO and Off-page SEO. On-page refers to all the tweaks you can do to content and code on the website’s pages. This may include optimizing SEO titles and descriptions, keywords within a page or post and headings and image SEO. Off-page refers to all SEO activities that affect the site that doesn’t take place on the website. This includes link-building, local SEO like Google Business Profile configuration and local citations for business directories. There are other ways to classify SEO that showcases what the scope of agency work might fall under. These include foundational SEO, which sets up your website for success and is similar to On-page SEO. There is also technical SEO, which involves the speed and technological infrastructure of your website and where you host it, as well as fixing any errors or warnings that show up in Google Search Console, such as broken links. Finally, the big one really is content marketing and content-driven targeted SEO. This is where you build content to rank for important keywords in your industry. This requires research, writing and effective blog publishing.