Which of the following are variables that may affect campaign performance?

Campaign performance can be influenced by a variety of factors. Poor customer reviews directly impact consumer trust and willingness to purchase, leading to lower conversion rates and reduced campaign effectiveness. Major shopping events like Prime Day significantly alter consumer behavior, increasing competition and potentially driving up advertising costs, which can affect return on ad spend if not accounted for. Other variables not listed but equally important include ad creative quality, targeting accuracy, budget allocation, bid strategy, seasonality, and competitor activity. Therefore, all listed options (and many others) are variables that may affect campaign performance.