What is SEA or how does search engine advertising work?

SEA - Search Engine Advertising.

The literal translation of this phrase is "search advertising". This is the so-called contextual advertising. An ad unit that is visible to users on search engine results pages. That is, if a person writes "nails" in a search engine, he is most likely looking for nails, and he will be shown an advert that matches his request. This method is effective because you attract targeted visitors.
It is one of the most convenient and effective means of advertising and promoting goods and services on the Internet. Easy to use, visual, and most importantly, completely natural and understandable for anyone who has ever encountered it, search advertising has recently gained immense popularity and is now rightfully considered the most advanced advertising technology available on our planet.