The Ad.afy11.net address is associated with a PUP (Potentially Unwanted Program) that has adware capabilities. As a result, affected users will encounter random pop-up during their browsing activities that have been generated by Ad.afy11.net. The pop-ups could appear no matter what Web browser the user is using - Chrome, Firefox, Edge, etc.
The advertisements from Ad.afy11.net could try to trick users into downloading additional PUPs. They may show dubious messages claiming that an update is required or a piece of software must be installed. When users click on the conveniently shown 'Download,' 'Update Now,' or 'Click to install now' button, they will instead be agreeing to get another dubious application delivered to their computers or devices. The intruder application could be a browser hijacker, adware, toolbar or another type of PUP.
Adware applications are designed specifically to generate monetary gains for their creators through the delivery of intrusive and unwanted advertisements. Users will see a significant increase in the banners, pop-ups, surveys, in-text links, and other advertising materials. Furthermore, to make the delivered advertisements appear more legitimate, they may be injected into unrelated third-party websites.
PUPs also are known for spying on the user's browsing activities. The intruder applications could be collecting vast amounts of information and then transmitting it to a remote server under the control of their operators. The gathered data may include the entire browsing history, all clicked links and every Web search. Device details also may be acquired - IP address, geolocation, browser type, ISP, etc. In the most threatening cases, the PUP could even try to obtain debit/credit card details or payment information that has been saved to the affected browser.