Optimizing media is one of the most important roles in marketing, because you control all the budget! Modern platforms have myriad options in terms of different settings and optimization decisions you can make, which makes for a complex and results-oriented role. You need to be savvy with data, as well as having an understanding of targeting, and know when to swap creative in or out based on its performance. This field is extremely competitive and fast-changing, with sometimes multiple major changes coming in a matter of weeks.