If a journal is peer-reviewed, does that mean anything within the journal is credible for your writing and research? Why or why not?

 If a journal is peer-reviewed, does that mean anything within the journal is credible for your writing and research? Why or why not? How do you know if a journal is peer-reviewed?  What does it mean to critically analyze an article?

Thanks for installing the Bottom of every post plugin by Corey Salzano. Contact me if you need custom WordPress plugins or website design.