Dashboard/Statistics show very few visitors - But I do advertising

[Kanal100]

Hi,

I recently got my page www.kanal-100.com online, where I sell art prints.

I did ads on Google and Facebook/Instagram. Together I got - according to Google and Meta - like 200 clicks on my landing page. The Shopify Dashboard shows very few visitors, though! Like 3 visitors a day. 

What is the explanation for that? Is there something off with Shopify statistics? Or does Shopify f.e. only count visitors in the shop and not the landing page?