Domain parking is the simple concept of taking a domain that you own, placing it on a host, and creating a website filled with ads. If a person happens to "stumble-upon" the website, there will be related content (to the domain name) that may lead them to what they are looking for. This is so much better than creating a silly page that says "Under Construction" or "Temporarily Not Available".

Quick Comparisons of My Domain Parking Picks

Domain Parking Services
Vendor Name	Monthly Fee	Optimization?	Minimum Payout	Payment Types	Minimum Domains	Remarks
Sedo	NONE	YES	$20	Paypal, Direct Deposit	1	Easy, Optimize to keywords, Templates, Domain Brokering
Namedrive	NONE	YES	$20	Paypal, Wire	1	Park and Sell: After one month, they may offer to buy your domain.
iMonetize	NONE	YES	$25	Paypal, Wire, Check	1	Testing and Optimize across multiple services
DomainSponsor	NONE	YES	$50	Paypal, Wire	1	Above average payout, no options
GoDaddy	$3.99	NO	$15	Direct Deposit, Check	1	Simple and intergrated into your GoDaddy Account
Parked	NONE	YES	$20	Paypal, Wire, Direct Deposit, Check	10	Bi-monthly payment and anti-click fraud mechanisms
TrafficZ	NONE	YES	$25	Paypal, Check	100	Bigger domain manager. No costs, high earnings, but large volume needed.