Opinion is the judgment of something, someone or something questionable in particular. Personal opinion, is to give a concept or judgment of something that we ourselves value, without imitating or reproducing the ideas of others.
Opinion differs from knowledge. It was the ancient Greeks who differentiated the doxa (opinion) from the episteme (knowledge). Opinion is internal, subjective, variable, most of the time it is interested and does not have to have a basis. On the contrary, knowledge is objective, general, concrete, and has some kind of evidence to back it up.
In the journalistic field we try to clearly distinguish what is opinion and what is information. An example of the first case would be the newspaper column, where the writer expresses his opinion on a current topic. An example of information is news, which must be rigorous and answer a series of questions: what happened, when, how and where. Opinions should not be incorporated into the information, at least explicitly or directly, since it is inevitable that indirectly or between the lines the journalist moves his personal opinion.
Opinion, in any case, is generally associated with subjective judgments. The phrase "This car has four wheels" is not an opinion, as it can be contrasted with the reality of the car. In exchange, a phrase like "This is the best car of this age" is an opinion that depends on what the sender of these words expected of a car, their expertise and a series of personal problems.
Throughout a day we hear all kinds of opinions. In principle, they are all respectable, although there are some who have a basis and rigor and other opinions are more capricious. If someone says that that person does not like you and does not give any information or information to discuss it, they are expressing their personal opinion, but it would be more valuable and more meaningful if it is accompanied by the reasons that they have for the famous person. to fall ill.
We are going through an era where we can all post our ideas about things and other people, regardless of whether we do it seriously and fundamentally, or simply to annoy and confuse readers. It is necessary for companies to begin to moderate this activity, so that the fraction of useful information present in the comments can finally be exploited. Nintendo has done it with its social network (Miiverse), which indicates whether users own the games they think about; all that's left is to wait for other companies to follow suit.