Head to 'Setup' tab of the Growth Tool and follow these 3 steps to install it on your website correctly:
1. Authorize your website.
Insert your website URL in Add New Website field, you'll be able to see all of them in Authorized Websites list.
2. Install ManyChat Snippet.
This code allows ManyChat to display opt-in forms on your website and track subscribers' activity.
Copy the code to a clipboard and place it into the <head> of every page of your website. If you have a Wordpress site, you can install Insert Headers and Footers Plugin that allow you to manage your <head> scripts.
3. For Embeddable widgets:
Embed the code (you will find it right in your Setup Tab) into your page where you want the widget to appear.
For Overlay widgets:
Choose web pages on which you want the widget to appear by using Visibility Settings:
PS: Removing ManyChat logo from Growth Tools.
Pro ManyChat users can remove the logo from their Growth Tools in the account settings:
Hopefully this helps!