Explanation of Orb of Fusing

Can sombody supply some summery information on how and why to use the Orb of Fusing. They seem very popular but I'm not sure I get what they do or how to use them, or hte value of fusing ect.

Thanks

Fusing orbs randomly join the sockets on items together. They can create links (the gold lines) joining one socket to another which allows you to make use of Support Gems.

Support Gems need to be connected to a Skill Gem in order to add features to that skill. For example if you have a Poison Arrow skill gem in one socket, linked to another socket that contains Added Cold Damage then your arrows will inflict poison _and_ cold when they hit.

Fusing orgs are highly sought after for the fact that many people want highly linked gear, so in end-game people want 5 or 6 linked armor and weapons so that they can add multiple supports to a skill. The reason they are wanted in bulk is that it's random whether a link between sockets will fuse, so it gets extremely unlikely to link say 6 sockets all together. Even if you get 5 sockets linked the risk of using another Fusing means you may just as often end up with no links on the next attempt.

so you need to use a lot of them to craft top-tier gear, hence people wanting them in the hundreds :)