Only certain levels of user can add complex code to their site, if you are at that level then it is relatively simple to add code snippets to your WordPress website by using the Text widget. (for our clients we recommend they talk to us before adding extra code ). Each WordPress theme should have one or more sidebars defined, and each of these sidebars can be used to contain multiple widgets.
A common request is to add some custom code to a WordPress website, and one way to achieve this is using the Text widget in a an appropriate sidebar.
In this video I will demonstrate adding Twitter widget code into a Footer sidebar of a WordPress site.