SEO is the process of making changes to your website’s structure and content so that people using search engines to look for what you offer can find your pages. A search engine is one of those users; it helps people find your information.
What does Seo stand for?
Search: This is what people do when they need to find something or someone who can answer their question.
Search engine: A site (like Google or Bing) where a person can perform a search.
Search engine optimization: What you do to get said search engine to connect said search with your site.

Types of Search Engine Optimization
On-page SEO: also known as on-site search engine optimization. It optimizes webpages and their content for search engines and users. It helps pages rank on Google.
Off-page SEO: Getting pages on your own site and other sites to link to the page you want to improve. Your off-page includes things like backlinks, internal links, and your image.
Local seo:Local SEO is the most effective way to generate consistent leads for your business.
When you’re searching for a local solution — your need is specific to a location and your urgency is high — it works.
Technical SEO: The process of making changes to a website’s backend technology so that search engines can index and rank its pages more quickly. It means making changes to the site’s speed, mobile friendliness, security, and design to make it more visible and improve the user experience.