The Integration ID is needed for embedding Sign Customiser on your website. This is how we know which e-commerce backend we should create your products in.
To find your Integration ID:
Log in to Sign Customiser
Click on "Tools & Settings" -> "Integrations"
Click on your Integration
Underneath its title, you will see a badge with
ID: 123- copy the number after "ID:"
Now in your HTML, use that number where it says integration-id=""
<sign-customiser-embed
integration-id="123"
...
></sign-customiser-embed>
Note: the above example omitted other required attributes for brevity, ensure you have all of the required attributes noted in your Integrations Setup Instructions.