Claim Aethir is a type of pop-up advertisement that appears in web browsers, typically as a result of adware or potentially unwanted programs (PUPs) installed on a user's computer. These pop-ups are designed to generate revenue for the creators by redirecting users to sponsored websites or displaying intrusive ads. Claim Aethir pop-ups can be very annoying and disruptive to users' browsing experience, as they often appear without warning and can be difficult to close.