Brokers are required to execute our trades. Today most Brokers provide both:

• A traditional full service option with a dedicated Client Advisor and

• A price competitive online electronic service.

It's up to the trader to decide upon which service will best meet their needs.

For more information see the following links:
Wikipedia
http://en.wikipedia.org/wiki/Broker

The Motley Fool
http://www.fool.com/school/basics/basics07.htm