What is the most important thing to launch a new project?

I think that the most important is to set up a good marketing strategy, and this is what we struggle with at https://www.producthunt.com/post.... The quality of product can be amazing as well as a sales strategy but what I learnt is that the first clients will come after good marketing and brand awareness. P.S. If there are any startups for marketing here, I would be glad to get in touch with you guys.