Easy to configure basic functionality
For early-stage companies, it is a good option due to very little maintenance needed
There is no way to host PHP scripts in Squarespace without an additional plugin
Custom code options are limited:
CSS and Javascript can be implemented
There are not element IDs or names if attempting to use HTML DOM
Content CANNOT be created with code, only modified slightly
Forms are limited
Cannot restrict field input
Form entries are disposed of after submission:
You cannot use form input in any custom code to display content based on user input
Must connect form to email or google drive to store submissions
Cannot use HTML DOM on form fields due to no element IDs
Documentation is a bit misleading/incomplete – don’t assume Squarespace can perform certain functionality even if the documentation says it is able to
A lot of times, you need to purchase an additional plugin