To change Page URL on Squarespace, you can follow quick steps.
Note: Changing Page URL can affect SEO.
#1. First, hover on the page that you want to change the URL and click on the Gear icon
#2. Next, on General , you can change your new page URL at URL SLUG and click SAVE
#3. After changing the URL, you can consider redirecting the old url to the new url in URL Mapping to avoid SEO.
Access Settings > Developer Tools > URL Mappings
