Both numbers from our page are identical.
Can it be correct, even though we know, that users with respective user ID ( set via
setUserId) enters our page on two devices, Laptop and Smartphone, and thus uses two different browsers?
Unique visitors are determined using first party cookies stored in your visitor browser. When a same person visits your website on two different devices (for example their laptop and on their mobile phone) then Matomo (Piwik) will detect two unique visitors.
@SteveG , could you help, please?