Put down your pitchforks and torches… I’m not saying you should stop split testing. But I am saying that there are a few “red flags” that a split test can inadvertently throw up if you’re not managing or monitoring it correctly. It’s a fine line you have to walk if you do both conversion optimization and search engine optimization. Most people think the two can’t co-exist peacefully, since you’re either writing for people, or you’re writing for robots. But you have to ask yourself – what’s more important? Convincing customers to order or appeasing an algorithm? (kissmetrics.com)