Local Storage is a web storage feature that allows websites to store data directly in a user's browser. This data persists even after the browser is closed, making it useful for saving user preferences, session information, or other small amounts of data. It is part of the Web Storage API and is accessible only to the domain that created it. Unlike cookies, which are sent to the server with every request, Local Storage data is not transmitted with HTTP requests, making it more efficient for client-side storage. Each domain can store up to 5-10 MB of data, depending on the browser, providing a simple way to enhance user experience without relying on server resources.