Notes
In Salesforce, a static resource is a file that is stored in the Salesforce system and is used to store content that is used by a Visualforce page or a Lightning component. Static resources can include images, JavaScript files, style sheets, and other files that are used to enhance the user interface of an application.
Static resources are loaded from the Salesforce server when a Visualforce page or a Lightning component is loaded in a user's browser. This makes them an efficient way to deliver content to users, because the content is stored on the Salesforce server and can be easily accessed by users without having to be loaded each time the page is visited.
To create a static resource, you can use the Static Resources page in the Salesforce Setup menu, and you can upload files directly from your local machine. Once the static resource is created, you can reference it in your Visualforce pages or Lightning components using a URL that includes the name of the static resource.