HTTP 403 is a status code that indicates a client is forbidden from accessing a specific resource on a server. This means that the server understands the request but refuses to authorize it. Common reasons for receiving a 403 error include insufficient permissions or restrictions set by the server administrator. When a user encounters an HTTP 403 error, it typically means they do not have the necessary rights to view the requested page or file. This can happen on websites that require user authentication or when access is limited to certain IP addresses or user roles.