So should I add my logo?

Guess what? It's proven that putting your logo on your print ad, banner ad or TV commercial increases purchase intent. There is an actual study on this in fact. Once I find the said study I'll post the link. I do know that IPSOS did some work with P&G's Oil of Olay and found that their brand mark along with a human form image (beautiful) girl's face lifted purchase intent significantly (about 40pts) over the index of 100. However, you don't always want to put your logo on there if you're trying to engage the audience and are trying to convince them of a message that would have otherwise been dismissed if your brand mark was visible. How do you know when this is applicable? External market conditions or a consumer perception that your brand stands for x when you're trying to communicate y.