New media: TV and newspapers are the new media of TV, and TV is the new media of websites.
New media and self-media collectively, including WeChat, Weibo and self-media platforms, belong to new media.
What does drainage promotion mean? For example, if you build a website but no one knows your website, then we can apply for a self-media platform. Take Sohu as an example. Sohu is one of the four major portals in China. You post an article on it, which contains information of your own website-brand name and link; Sohu also has many users. You can let more people see your article on it, so that the information (brand name and link) of your website in the article will be seen by more people. If you don't see it, you may wish to click this link to enter your own website, and your brand will be known by more people, thus achieving the effect of promoting drainage.
Drainage: it is the flow. Website traffic can be understood as how many people have entered your website and how many pages have been read.
Promotion: spread your brand on the internet and let more people know.
Summary: There are many ways to come out from the media, such as Weibo, WeChat official account, QQ group, etc. You should choose the promotion platform according to your own industry.