Add the snippet
- Go to Pages, scroll down and open Custom code → Code injection. On older sites it's Settings → Advanced → Code injection.
- Paste the snippet from the Install page in Chattish into the Footer box.
- Click Save.
Check that it works
Open a page of your site, then click Verify installation on the Install page in Chattish.
If we can't read your Squarespace site
Squarespace sometimes shows bot protection to crawlers. If your map stops with "Your site is blocking bots", use Map from my browser once the snippet is installed.