For every startup that grows to the point where it can go public or be profitably acquired, hundreds of others sputter and die. Smart entrepreneurs know that the key to success isn't the originality of your offering, the brilliance of your team, or how much money you raise. It's how consistently you can grow and acquire new customers (or, for a free service, users). That's called traction, and it makes everything else easier - fund-raising, hiring, press, partnerships, acquisitions. Talk is cheap, but traction is hard evidence that you're on the right path.
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