What are the effective advertising channels at present?

First of all, I think advertising is basically effective, but the effect is different (putting masks on H website is of course useless).

Then, in the case of unclear industry, the more common channels are:

SEM: Bidding Optimization of Baidu, 360 and sogou

Information flow delivery: delivery of major video websites.

Media platforms: Baidu Post Bar, Today's Headlines, etc.

It is often not the platform that determines the advertising effect, but whether the people corresponding to the product buy your advertisement.