SEM
Search Engine Marketing means nothing other than marketing in search engines. This concept encompasses all promotional activities (e.g., SEO, positioning, campaigns using sponsored links) that are intended to help a website achieve the best possible search results.
Read also:
Useful links:
https://pl.wikipedia.org/wiki/Marketing_w_wyszukiwarkach_internetowych
https://www.eactive.pl/pozycjonowanie-stron/co-to-jest-sem-i-czym-rozni-sie-od-seo/
https://www.eactive.pl/google-adwords/dobra-strategia-sem-8-najwazniejszych-elementow/