Which of these is important to consider before believing health or fitness information you find online?
the length of the information
the number of comments on the article
the qualifications of the author
the reading level of the information

The correct answer is the qualifications of the author.

It doesn't matter if the medium is online or in hardcopy you should always check the qualifications of the author for non fiction information so for example health and fitness. You need to make sure that the information that you are reading is legitimate, reliable, has a basis in scientific fact and is trustworthy, the way to do this is to check the background of the author and their credentials.

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.