Networking involves using the vast numbers of people that you know -- your family, friends, neighbors, colleagues, customers, vendors, associates, etc. -- as information sources for job leads.
The more people in your network, and the more people each person in your network knows, the greater number of job leads.
It used to be that employers only had resumes and and interviews to go by when making hiring decisions. That changed with the Internet and social networking.
Below are a few links to help you manage your online reputation.