Commentary or Analysis articles are sort of like editorials (opinion) but usually written by experts on a certain topic. While they may take a particular viewpoint or express opinions or feelings about a topic, they are also viewpoints or opinions that are grounded in the author's expertise and analysis of a situation or research. They are not like peer-reviewed research articles, in that they are not unbiased, but they can be important perspectives to consider.
Here are some examples of commentary and analysis publications:
Searching for Commentary & Analysis is not as simple as searching for research articles, but it can be done!