What is the Package Fee (Branded Fare) in Airline Tickets?

The package sales system is an application that offers the possibility of personalization in air travel travels in line with the wishes and needs of the passenger. The package applications of the airline companies, which also take into account the wishes of the passengers in air travel, differ. For example, four different package options named Pegasus Super Eco Package, Eco Package, Advantage Package and Business Flex; Turkish Airlines offers the opportunity to choose Ecofly, Extrafly, Primefly and Business packages.