Seo and sem average phrases

https://www.scribd.com/document/996265484/%CE%92%CE%B5%CE%BB%CF%84%CE%B9%CF%83%CF%84%CE%BF%CF%80%CE%BF%CE%AF%CE%B7%CF%83%CE%B7-%CE%BC%CE%B7%CF%87%CE%B1%CE%BD%CF%8E%CE%BD-%CE%B1%CE%BD%CE%B1%CE%B6%CE%AE%CF%84%CE%B7%CF%83%CE%B7%CF%82-search-engine-optimization-%CE%9F-%CE%BC%CF%8D%CE%B8%CE%BF%CF%82-213920

SEO