Should we start with advertisers or publishers to create an ad platform?

Hello there,
I just finished creating my own advertising network to connect website owners looking to monetize their content with advertisers.
I just realized that there is a big problem (The classic Chicken or Egg) to create the effect of the network on my platform.
Should we start with the creation of the offer, that is to say the publisher sites who wish to monetize their content or by demand, the advertisers who want to buy traffic?
Before asking the question here, I looked for emails of...

Should we start with advertisers or publishers to create an ad platform?

from General Business https://ift.tt/3xZfNDv
via IFTTT