SEO is not a static process but rather a framework with rules and processes.
For simplicity though, SEO can be broken down into 3 main types:
Technical SEO: With technical SEO you can ensure that search engines can crawl and index your website without any issues.
On-site SEO: Rules to apply on your site and content to make it search engine friendly.
Off-site SEO: Ways to promote your website or blog so that it can rank higher in search results.
The first stage in the SEO process is called technical SEO. As the name implies, technical SEO has nothing to do with the actual content of a website or with website promotion methods.
It has to do with settings you need to configure to make the job of search engine crawlers easier. Usually, once you get your technical SEO correct, you may not have to deal with it again.
On the other hand, if you have problems with crawling and indexing, it can negatively impact your rankings.
To perform a technical SEO audit review and ensure that everything is working as expected, read our Technical SEO Guide.
The second stage is On-Page SEO. On-Page SEO has to do primarily with the content and other elements found on a page.
Unlike technical and off-page SEO, the main focus of on-page SEO is to provide search engine crawlers enough signals so that they can understand the meaning and context of your content.
Remember that search engines don’t read a page like a human so they are looking for signals to figure out what a page is all about.
It is at this stage that you will deal with website structure, SEO keywords, title optimizations, headings, internal links, image SEO, structured data markup and other techniques that can send the right signals to search engines.
If followed correctly, on-page SEO will also improve the usability and credibility of a website or blog.
Note that content optimization is part of on-page SEO but sometimes this is referred to as Content SEO.
Our On-Page SEO Guide explains the different on-page SEO techniques in detail.
The third stage is Off-Page SEO.
Besides the changes you can do to your website (on-site SEO) so that it ranks higher in the SERPs, the other way to improve your website’s ranking position is by using off-site SEO techniques.
Off-site SEO is generally known as link building but I prefer to use the term web site promotion since a proper way to promote a website involves many more methods and techniques than building links.