There are 2 methods to install the bot on your site-
1. Directly injecting code into the website
Directly injecting is suggested when if you haven't installed the Tag manager on the website.
copy the code snippet from the bot settings page
Paste the snippet into the <head> and </head> tags on the page(s) on which you want to show Mailcastr bot.
All done!. Try the website in an incognito window and check the web dashboard for responses. There might be small delays in updating the response on the dashboard.