Majority of airlines all across the world are offering Electronic Tickets or e-tickets. One of the major benefit that an eTicket offers is that it does not require a paper ticket/record as a confirmation of your flight. The confirmation of your travel lies in the airlines computerized ticketing system in an electronic format.
An e-ticket offers the following advantages: You need not carry a paper ticket while traveling and hence there is no fear of losing them or forgetting them behind. Since they exist in electronic format, you do not have to wait for your ticket to arrive by post. You can use your E-ticket at the self service check in machines avoiding long queues at manual check in desks. (Offered by most airlines) You can also print your boarding pass and track your air miles (if applicable) by using these automated machines.
To use this service you will need of the following means of identification:
The credit card used to purchase your tickets.
Traveler loyalty card.
An e-ticket receipt.
You will need to confirm the airline reference number given at the time of booking.
Please note that some airlines still issue paper tickets for certain flights on certain sectors. If you receive a paper ticket (a card ticket/coupon in a wallet) you must present this at the airport check in counter or you will be unable to board your flight. In case you are unsure of the type of ticker (e-ticket / paper ticket) issued to you.
You can find more such FAQs in this page regarding Flights Booking and Important Documents information.