Soft article. Tweets are articles of application promotion nature. Tweets are also called soft articles. They are not rigid articles, but convey to readers the products and content you want to promote in implicit words. The essence of tweeting is to build a website with enterprise products or services as the core content, and then display the website to netizens through various free or paid channels. Online promotion can achieve the effect of small investment and large return, so It is said that corporate tweets are soft articles.