General
Adding site and page descriptions for SEO
https://support.squarespace.com/hc/en-us/articles/206016198-Adding-site-and-page-descriptions-for-SEOHow to change the links that appear under your site on Google
https://www.create.net/support/how-to-change-the-links-that-appear-under-your-site-on-googleGoogle Search Console
https://search.google.com/search-console/about