What is self-operated advertising? How to put in self-operated advertisements?

Social advertising is to awaken and stimulate people's patriotic enthusiasm.

Public service advertising is for public welfare, and it is to educate people to have good thoughts and morals.

Commercial advertising is to let people know about a commodity and achieve the purpose of sales.

Self-advertising is an advertisement in which a merchant advertises for his own goods, seeks his own sales, self-sales and self-trading. There are many forms of self-help advertising. Every day, many businesses and individuals in the society are doing self-operated advertisements. For example, in the streets and markets, some small vendors are making self-operated advertisements, and the shouts are deafening and chaotic.