Seo and sem trouble-free terms

https://www.scribd.com/document/921532875/Web-%CF%80%CE%B5%CF%81%CE%B9%CE%B5%CF%87%CF%8C%CE%BC%CE%B5%CE%BD%CE%BF-%CE%BC%CE%AC%CE%B6%CE%B1%CF%82-%CE%BB%CE%AD%CE%BE%CE%B5%CE%B9%CF%82-%CE%BA%CE%BB%CE%B5%CE%B9%CE%B4%CE%B9%CE%AC-%CF%83%CF%85%CE%BD%CE%B4%CE%AD%CE%B5%CE%B9-search-engine-optimisation-219199

search engine optimisation