There are different types of SEO that can be applied, depending on a website's objectives and the nature of the industry. Here are some of the most common types of SEO:

White hat SEO: This refers to techniques that are in compliance with search engine guidelines and aimed at providing valuable content to users.

Black hat SEO: These are techniques that violate search engine guidelines, such as buying links, using hidden text or links, and keyword stuffing to manipulate ranking.

Grey hat SEO: These are techniques that fall between white and black hat because they are not explicitly prohibited by search engines but may still carry risks.

On-page SEO: This refers to techniques used to optimize a website's content and metadata to make it more relevant to users and search engines.

Off-page SEO: These are techniques aimed at improving a website's authority through link building, social media, and other external factors.

Technical SEO: This refers to the technical aspects of a website, such as crawlability, indexability, mobile responsiveness, and load speed, to ensure it works well for users and search engines.

Local SEO: These are techniques aimed at optimizing a business's online presence for local searches, such as Google Maps and other local directories.

Enterprise SEO: This is a strategy aimed at optimizing search results for large companies and organizations with multiple locations, often using advanced tools and techniques.

These are the most common types of SEO applied in the industry.