An editorial is a newspaper article that expresses one's opinion. An editorial can be about any topic, but is usually written about an issue that deals with our society. To build credibility, the opinion in the editorial must be backed up with facts and evidence to substantiate your opinion.
Read more at http://grammar.yourdictionary.com/grammar-rules-and-tips/tips-on-writing-newspaper-editorial-format.html#FHrP44xvb5AtkJOj.99

1. Choose your topic wisely

2. Declare your agenda outright

3. Build your argument

4. Strengthen your argument with analogies

5. Provide possible solutions

CHARACTERISTICS OF EDITORIAL WRITING

An editorial is an article that presents the newspaper's opinion on an issue..