There are four main types of SEO: technical SEO, On-page SEO, Off-page SEO, and Local SEO. Technical SEO involves fixing the website’s backend and making it SEO friendly. This involves robots.txt, sitemap creation, hreflang inclusion, core web vitals review, and crawlability check, etc.
On-page SEO involves writing appropriate meta titles & description, adding alt tags, having proper H1-H6 structure, and much more.
Off-Page SEO is a process of getting backlinks from reputable sites through article or post submission. Local SEO includes optimisation of Google Business profile, generating backlinks from local directories, and ranking in the map pack for targeted keywords.