Occasionally a client will need a script added to or removed from their site. There are a few places scripts are located on the WordPress back end.
For site-wide scripts (eg – accessibility plugin, etc) , they go in Genesis > Theme Settings > Header/Footer Scripts. Older sites with old themes will be similiarly located.
For scripts that go onto single pages but don’t have a UI element (eg – ads tracking codes for different landing pages or city pages), they can be added by opening the page in the editor and scrolling all the way to the bottom and placing the script into Scripts > Body Scripts and for Body Scripts Position select “Bottom: before closing body tag.” For scripts with UI elements that are to appear on the page, it is not unwise to contain the script in a div with a class on it so you can tweak the style of the element to match the client site.
Contact form scripts or other scripts with a UI element often go into Dynamik > Custom > Hook Boxes, and occasionally into Appearance > Widgets > whatever widget > Custom HTML (usually on older sites). and usually they have a UI element that is to appear in a header or sidebar. If there is a UI element, it is not unwise to contain the in a div with a class on it so you can tweak the style of the element to match the client site.