When to use the article tag

I have a question on the semantics of article and when to use it, correct me if i am wrong in my statement it should be used if the content is different but related meaning that its independant?

Yup — think a blog post, or a news story on a website. You should be able to take everything in that article tag and put it somewhere else and it would still make sense (like you could take a newspaper article and put it on another website and it would still make perfect sense)