1) Interesting links/insight, if I see someone posting good stuff on HN I might follow them on twitter.
2) Keeping track of events in the tech/startup sector, there's nothing that even comes close to twitter in terms of allowing you to keep an eye on what's going on
3) Staying in touch with people you meet at conferences, etc.
If you're a business then Twitter gives you an invaluable source of feedback, people might not complain to you when they get frustrated by your product but they may well complain on their twitter. It's also a great source for customer leads.
1) Interesting links/insight, if I see someone posting good stuff on HN I might follow them on twitter.
2) Keeping track of events in the tech/startup sector, there's nothing that even comes close to twitter in terms of allowing you to keep an eye on what's going on
3) Staying in touch with people you meet at conferences, etc.
If you're a business then Twitter gives you an invaluable source of feedback, people might not complain to you when they get frustrated by your product but they may well complain on their twitter. It's also a great source for customer leads.