Find out a way to incentivize the visitors, give them free offer, buy one get one free, buy to get one free, mix and match, give them something that will grow their interest to re-visit your website. You see variations? You need to be marketing guy to market your stuff. Think about Facebook. Anyone can clone or create a social media but how many become as good as Facebook? None. Marketing is the key for everything to see it's success.
Thank you for your advice. My main problem is traffic. I will try first solve this problem
Traffic is not something you "fix" though. Traffic is something you earn.
And to earn something you usually need to spend some first, which means you need proper advertising. When you have a usable product at the very least, then you should think about attracting people's attention. Not now. What you need is now to focus on your project. Advertising is the easiest part. Thousands of people will shill for your product for pennies.
If you want people to find your product without spending anything on ads, then you must either have something very very rare, or very lucky.