Matt Cutts helped me scale my search engine optimization skills. A gentle voice, kind and engaging person who knows how to elaborate technical issues in an easy way. Reading his Google Search Console support documents and watching his YouTube videos I learned a lot and grew my respect towards SEO. Thank you, Matt! I must mention and express my gratitude to Danny Sullivan as well who got me introduced to SEO. And here is a video where both of them appears https://youtu.be/lnhK_BvrrcA