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Hi Sophy, I had a similar problem. I combated this by adding url conical. I also removed most of the backlinks to that particular category and redirected it to my index page. It took a couple of weeks to get back to how it was. It will be hard to find out the reason without posting a link though! Thanks

My best hidden SEO secret would be adding the websites phone number into the meta keywords for the homepage only. If you have a missed call from someone, most people just Google the number however if you have the number in your meta description/keywords it will display your homepage as opposed to your contact page. Once they are on the homepage they will more than likely check the contact us page then hopefully browse the website. I sometimes use an image for the contact number on the contact us page so it isnt picked up by the crawler. Its a pretty small secret but its one of mine

I can't help but agree with Lisa, YouTube video optimisation also follows backlinks. The more websites that display your video the more hits you’re going to get and YouTube will class your video as being more relevant. The king of YouTube optimisation is making useful, informative and valuable videos and the traffic will come. I occasionally use videos for a small injection of traffic in times of a promotion.

Hi Lisa, It will be a little tricky without actually looking at the website but my starting point would be what you have done, duplicate content elimination. If the rel=canonical is in place I would double check that it is a 301 re-direct. I would certainly take a look at the content to see if it is duped on third part websites. Some SEO firms just copy and paste segments of the website and add links. Another concern i would have is the backlink hosts status so I.E a website which seemed appropriate at the time has also been hit by the panda update and is now classed as spam. I would run a backlink checker + search for the content to see if it’s duped. Let me know how you get on with this, it will be interesting to see what the culprit is.