What are the advantages to using a web conferencing service?

Conference Call is nothing but Multiple people are exachaging voice , video or messages in between them in duplex mode .
one can initiate the conference between more than 2 parties at a time using conferencing

?Answer
For businesses, conference calling saves a lot of money since it would not be necessary to travel domestic or overseas to meet customers or clients. It is also a good way for sharing of documents that would support discussion. You can also get replies in an instant.