One of the mistakes you or your web developer can make is to setup your website and not keep track of who is visiting your website.
Even if you think the website is unimportant or not going to generate traffic, it’s important to still have the least form of visitor tracking.
Let’s say you have this site without any form of tracking. Ten, five or three years down the line, you decide to do something with the site, which by now has gained value (domain value, some traffic). It becomes impossible to trace the visiting history or pattern of the visitors of your site. No data on visitors/visits.
So, as a rule of thumb, always set up analytics on your websites and apps, even when you’re in beta or all you have is an idea. That way you’d have some basic information about your (potential) visitors.