Attending business events is one of several efforts that you can participate in to build new relationships. It is important to meet people face-to-face so you can interact live in person. Meeting in person vs. on a computer screen allows you to see how people react to your conversation with non-verbal cues. Also, in person allows you have to a more open conversation because you are unrestricted by a computer screen.
With that said, attending events is also a great way to further build your existing relationships. It is critical that you are visible with people in your network. So, by regular attending events, you will be able to interact with those who you already know.
Over time, you will start to see many of the same people at the same types of events. When this happens, you will start to build a certain comfort level and trust with these people. So, your relationships with strengthen.
The more you interact with these people at events, the more that you will be able to help one another. Many times you will be able to introduce new people to one another while attending an event. Also, this will happen more frequently outside of the event as well.
To build a great network, you need a diverse set of relationships and some very strong influencers and connectors. By regularly seeing people, these types of relationships will form.