I often speak to a lot of SEO newbies when I do talks or travel or even via emails and other communications. I find myself telling people in this space the same thing over and over again. Each page, each URL, should have it's own unique content.
It is amazing how often I see either people duplicating content across multiple URLs and/or targeting too many different pieces of content on the same URL. It is very common, maybe even more common than in the old days of how web sites use to be built.
So when John Mueller of Google posted a short and sweet post on Twitter summarizing this, I was excited. He said "one URL = one piece of content."
@marksoonphoto Yes. One URL = one piece of content.
— John Mueller (@JohnMu) June 21, 2016
It is so basic but yet so misunderstood.
Even for multilingual support, separate URLs. Just not for mobile vs desktop ;-), if the content is the same.
Forum discussion at Twitter.