Domaining is the business of buying and selling domain names, it includes parking domain names and creating websites to profit from domain names. Domainers often buy domains by the hundreds or even thousands and sell them for a profit. Most of the time domainers will park their domain names and generate pay per click income but developing websites from domains has become a new trend since a website can become more popular than a parked domain name and it can generate more revenue.

Another thing that domainers do is register domain names that could become popular or have a certain mean, for example of you owned buynewcars.com you could sell this domain to a car dealer for 100x of the original cost of the domain.

Domaining can be a very profitable business if done right, there are a lot of domainers making hundreds of thousands of dollars a year.