It depends on how you want how you want to approach it.
Never done it myself but like most community places you have three options with varying degrees of success.
1 the wrong way! but get on there and start posting away and hope people find it.
2 get on there make a group, speak to people build friends with similar interest and gradually bring on the item you want to advertise. But subtly people don't like it when things are carelessly thrown in their faces. (Hence why option 1 is usually very unsuccessful and will often do more damage than good)
3 do the same as option 2 but look into Linked Ins paid advertising.
Linked in is a very powerful network with lots more "professional" people than any other social network and if you approach it right and catch the eyes of the right people you can be on to a winner!
He who has never failed has never attempted anything worth succeeding at.
Dont Eat Animals, Its Not Good For Them And They Dont Like It!