Duplicate content is one of the biggest issues in SEO. I wrote an article about common causes and solutions of duplicate content recently and it was quite well received, which helped me to understand that lots of people still suffer from it.
One of the issues I’ve always found with explaining the issue to site owners / managers is that they don’t feel the “pain” as much as you do. For instance in Magento SEO projects: when there are two pages for a product (unfortunately a common issue with Magento), they both work fine, and people can order from both just fine as well.
I’ve found a solution though now that helps me get rid of the issue: putting Facebook like buttons on those pages. Quite soon, they’ll find out that the like counts for the two product pages aren’t the same, or you could just show them that they’re different. In my experience, this helps me convince my clients to “do the right thing”, as they’ll want the combined, higher, like count for their pages. The same trick will work with Twitter Tweet buttons by the way!
Do you have tricks like this to convince your clients? Share them in the comments!