Please take the time to read the conditions of a reservation attached to a ticket before making a reservation. Examine the baggage allowance, cancellation terms, change conditions, and so on.
Each airline ticket may have its own rules which can be different, which is why it's important not to take anything for granted, or you could be in for a surprise later. Official airline booking information, such as, for instance, information about different fare classes, booking restrictions, fees and optional services may be provided.
Also carefully read the passenger information before booking. If there is a slight error in a name, date, destination or other booking information, it can cause issues which are much more difficult to rectify once the ticket has been issued.
One of those things people sometimes think about only when packing their bags is baggage. It may be too late to make changes by that time without extra cost or hassle.
There are various policies and restrictions that can be enforced for checked baggage, carry-on baggage, weight limits, size limits, and restricted items among the different airlines. The allowance is also subject to the type of ticket bought.
Before leaving for the airport, check the current baggage information for your particular booking. If you are bringing sports equipment, musical instruments, oversized luggage and other unusual items, find out what are the requirements of the airline beforehand.