How to create a google site map

https://griffincenter.org/seo-stin-ellada-simera-o-pliris-odigos-gia-ypsiloteres-theseis-peris/

How to create a google web page map<br/>A fast search on Google for guidance on growing a site map originally threw up many hyperlinks to software program it's worthwhile to buy or obtain without cost to create a website map