The target audience of this kind of web site is especially people who are looking for information about a travel. So, they come in this web site to get many and diverse information as prices, dates, availability.
That could be people with a certain facility with new web tools. (Men and women between 20 to 65 years old).
Looking for leisure travels, hotels, flight tickets.
These information are for both sites. Kelkoo.com and alibabuy.com.
What are the benefits of using an aggregator site ?
When you are using an aggregator site, you are sure that you will many propositions and not just one.
So you will be able to pick the one which are the most in your interest.
An aggregator site will compare with different travel site and give you the best price if you are looking for the price. Or the best date, if you have a constraint with some dates.
So with an aggregator web site, you have not just one proposition but dozens. And just have to select the most familiar to you.