The term "optional extras" refers to additional features or services that can be added onto a product, service or experience at an extra cost. These extras are not necessary for the basic functioning of the product but they may enhance its performance or provide additional benefits. The phrase is commonly used in various contexts such as car rentals, hotel bookings, insurance policies and electronic gadgets among others. For instance, when renting a car, optional extras could include GPS navigation system, extra driver coverage, or an upgrade to a larger vehicle model. In the case of hotels, additional services like room service, spa treatments, or early check-in can be considered as "optional extras". The term is also used in insurance policies where customers have the option to add on coverages for specific risks such as accidental damage, legal expenses, or extended warranty.