Author engagement is important for an indie author because it humanises you to your potential audience and encourages them to be interested in you and emotionally invested in your success. If readers feel that you are their friend, they will be more willing to support you and your work.
But recently I’ve come across a few authors who just don’t seem to get it. They posted links to their blogs without getting stuck into conversations, or they tweeted nothing but promotional information about their books. From a reader’s point of view, this is off-putting. Nobody likes a spammer. What we want to see in our twitter feeds and on the forums we frequent is interesting information, helpful advice, people talking with passion about something they enjoy.