Device targeting refers to the practice of delivering online advertisements to specific devices, such as computers, smartphones, or tablets, based on their unique characteristics, such as their operating system, screen size, or location. This allows advertisers to target their ads more effectively and reach the right audience on the right device. Device targeting can be achieved through various methods, such as device fingerprinting or the use of cookies, and is often used in conjunction with other forms of targeting, such as geographic or demographic targeting. Device targeting can be an effective way to increase the relevance and engagement of online ads, but it also raises concerns about privacy and the potential for abuse.