Seo and sem usual terms

https://onemillionblogs.net/seo-marketing-simera-o-pliris-odigos-gia-perissoteri-oratotita-episk/

SEO and SEM basic Terms<br/>web optimization = Search Engine Optimization<br/>Search Engine Optimization is the method of scientifically tweaking a distinctive sites pages in an effort to get an effective rank from main search engines like google