GVO has a low starting price point, which makes it perfect for someone just starting out in network marketing. $1.00 for the first 7 days and then $9.97 per month. The low price point also makes it easier to promote.
It also has the tools necessary to run a network marketing business online. The main two being the ability to host 4 websites and an autoresponder. In fact, GVO is the hosting service for Profitable Network Marketer. Here is the link to the main sales page for Host Then Profits which goes into greater detail.
Once you get more experienced and are making money in GVO you can increase your earnings by buying their other products and becoming a reseller of them. The other two are GotBackup and PureLeverage. If you have the money you can get into all three at the same time, but it is not recommended that you do that until you are making some money to reinvest back into it.