Ad Networks are great for monetizing your traffic footfall. But they are not best suited for big publishers who get more than 1 million visitors monthly. If you have yet to reach that limit, ad networks will work great for your ad monetization strategy.
Some of the best ad networks that can help medium-scale publishers accelerate their revenue are Media.net, BuySellAds, Criteo, Propeller Ads, Revcontent, Adcash, Adblade Network, HilltopAds, RevenueHits, Clickadu, and Adsterra. These networks act as great intermediaries between publishers like you and advertisers.