Cool store - some interesting products there!
I can give you some SEO advice for free - if your page is selling a t-shirt, make sure you have "t-shirt" somewhere in your title tag (and url) if possible.
Take this product for example: https://www.meendo.shop/collections/best/products/champagne
It's a t-shirt with champagne on it - but there is no reference to "t-shirt" in the url or title tag.
You can see what it looks like in the search results in the screenshot below.
Google (and a human reader) may think that page was selling champagne, or at the very least be confused about what was being sold.
That problem seems to be quite common on your site. Tidying up your tags would be quite an easy fix and should definitely improve your search engine traffic numbers.