A tag-management system (TMS) is a type of technology that is used in the context of digital advertising to manage the process of ad serving, tracking, and reporting. A TMS is a piece of software that is used to host and manage multiple advertising tags or pixels, which are small pieces of code that are used to deliver and track ads on a website or app. A TMS can provide a way for advertisers and publishers to manage the multiple tags that are used in an ad campaign, and to ensure that they are delivered and executed correctly. A TMS can help to improve the efficiency and performance of ad delivery, and can help to ensure that ads are delivered to the right audience, in the right format, at the right time. A TMS can also provide a way for advertisers and publishers to track the performance of their ads, and to generate reports on metrics such as ad impressions, clicks, conversions, and revenue.