How to create a google web site map

https://open.substack.com/pub/tammondmwn/p/seo-google?r=63931x&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true

How to create a google site map<br/>A immediate search on Google for recommendation on creating a website map at the start threw up many links to software program it's essential purchase or obtain without cost to create a domain map