What is SEO

When website operators deal with search engines for the first time, they usually focus on a specific goal, e.g. the desire for more traffic or an improved conversion rate. There are two different strategies to choose from in search engine marketing: SEO and SEA. 

Here is the List:

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 SEA (Search Engine Advertising) can be used to display paid ads in search engines, SEO (Search Engine Optimization) is dedicated to organic, i.e. unpaid, search results.