There are many cases where a part of your website might need to be different from the rest, most of the time the standard design tools can solve this problem, especially with recent additions to Squarespace that allow you to change individual text colour and more! But when this isn’t enough custom styling that can target only one small part of your website is needed, and to do that we need to be able to find the unique page, section, and block IDs so that we can target them in our Custom CSS. My favourite way to do this is via a Google Chrome Browser Extension, you can find it here:

Squarespace Block ID Finder Extension for Google Chrome