The second author of the paper is useful, and to what extent it is useful depends on the specific purpose and the specific situation of the article. To be sure, the second author can play a certain role in the promotion of professional titles or other assessments.
We all know that the author's signature is based on the author's different contributions to the article and different participation. The greater the contribution, the higher the signature, and the second author is in the front position, second only to the first author, so the value and role of the second author are beyond doubt.
For some published high-level academic papers, it is not easy to become the second author, such as the second author of sci papers, and the second author of such high-level papers is also recognized. After all, not everyone can publish such papers, especially sci papers, which need to be written and published in English, and it is not easy for domestic authors to participate.
If you are the second author of a general paper, the value is not that high. So whether the second author is useful depends on the specific situation. Generally speaking, it is best for the first author to publish a general journal proposal or a single paper. The role of the second author is the above introduction.
There are many differences between the first author and the second author, depending on whether your situation is for promotion. If you are the second author, how to evaluate the professional title can be used for promotion, which saves you from publishing your own articles and is also the embodiment of your own academic achievements. Anyway, it is beneficial and harmless.