I've recently been thinking about starting an ad network with a new format for ads. I think the format is more engaging for viewers and more useful for advertisers. However, I'm not sure where i should start developing it, what would be your advice for how to develop the ads? The ads will be web based and square dimensions but I'm just not sure what the current best practises are for adtech. I'm competent with the backend but I'm not sure how to develop the ads.