A Progress Indicator is a visual element used in user interfaces to show the status of a task or process. It helps users understand how much of a task has been completed and how much is left. Common examples include loading bars, spinning icons, and percentage displays. These indicators enhance user experience by providing feedback during operations that may take time, such as file uploads or software installations. Progress indicators can be categorized into two main types: determinate and indeterminate. Determinate indicators show a specific percentage of completion, while indeterminate indicators indicate that a process is ongoing without specifying how much time is left. Both types are essential in applications and websites to keep users informed and engaged.