最佳化的兩種類型為何？請選擇兩項。

The two main types of optimization are media mix optimization and channel optimization. Media mix optimization involves strategically allocating advertising budgets across different media channels (e.g., TV, digital, print) to maximize overall campaign performance and ROI. Channel optimization, on the other hand, focuses on improving the performance within a specific advertising channel by refining elements like ad creatives, targeting, and bidding strategies. Bidding optimization is a component of channel optimization, specifically within digital advertising, rather than a separate overarching type of optimization. Targeting optimization is also a specific tactic within channel optimization, aimed at reaching the most relevant audience.