What direction to choose in advertising to quickly find a client?

Question

contextual advertising

What is worth studying, such as contextual advertising or targeted advertising on VKontakte, which direction has more prospects for development and a quick search for a client?

Answer 1

taking into account the fact that in setting up advertising the amount of knowledge is small and there are no hidden secrets either, then
I mastered all the targeting in VK in about a day a week after he appeared there and bought traffic for a penny, it probably took a week for the Yandex context, since there there are more subtle moments and I mastered it in my spare time.
the question sounds like I want to spend one hour on training where there will be more clients, clients usually want complexity, learn everything, in a week if you have brains you can learn how to set everything up.