OTA stands for: Online Travel Agency.
OTAs are online companies whose websites allow consumers to book various travel related services directly via Internet.
Travel shopping via online agencies has become very popular nowadays. Especially in the last minute segment and also because of the frequent usage of the smartphones. Today consumers are on-the-go and the advantage of a booking engine and the reservation solutions provided by the OTAs is that it offers instant payment and booking confirmation.
Examples of the most commonly known OTAs are: