How to get to million users in a short span?

For any start-up, getting a user base of million users is counted as a big achievement. For some it may be a break even situation and for others it may be the right time for pitching the product to investors to raise funding. It may take years for any start-up to get to the magic number of one million. Besides offering a quality product, start-ups need to work out SEO, SEM with a strong presence …