You can start here:
https://steemit.com/streemian/@chainsquad/streemian-com-to-open-its-doors-and-offer-a-20-discount
There's an FAQ linked at the bottom of that post as well. Basically, it's a service for you to create your own trail for voting. As the trail creator or "operator," any time you vote, the users that have joined your trail will also have a vote registered for them on that same post. There is a slight delay before their vote is recorded. Also - their voting percentage will be identical to yours. If you vote with 50% power, then anyone on your trial will also vote with 50% power. (You may not have that voting percentage option yet, if you just recently joined and haven't bought any Steem to power up.)
Thanks!