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I see your point: nicely done for UX because you see the different colors in small squares already on the category page. For now we don't have this option, I will see with our webmaster, it's quite interesting. Isabelle

Thanks a lot. In the end my webmaster solved the problem, nothing we be hidden this time, but the hint about js script instead of display none is valuable, thanks.

I see the other great responses to your question but wanted to provide some more info as well! Whether you’re familiar with anchor text or not, if you’ve spent any time on the Internet, you’ve seen it a million times. Anchor text is the keyword or keyword phrase that serves as the link to another web page or web site. Anchor text is typically highlighted like this: anchor text (if you click this example, another window will open up that contains our other blog http://bluecorona.wordpress.com). Anchor text is important because it gives web site visitors (and search engines) a hint about the web page or web site they are about to visit (if they click the link). This is why you DON’T want to use common calls to action like, “click here” or “our website.” Instead, you want to use keyword rich anchor text. If you’re having a contest to give away a free website makeover for the HVAC industry, make free HVAC website the anchor text! If thousands of web sites link to your site using the anchor text ‘leading residential furnace installers‘ there’s a good chance that you’re in the residential HVAC business and you install furnaces!

Hi Joe, When running a scan to find error pages or bad internal linked pages, what type of scan parameters do you use? This could make sense on why I'm seeing these strange 404 error strings, such as http://website.com/ http://www.website.com/cubic-zirconia-1/ Ideas, have you seen this before? run a Screaming Frog scan

You should always 301 redirect if you change a URL in any way! However, be aware that redirects do affect your SEO ranking, so if you're able to leave a URL as it is on a page with decent traffic, it's typically suggested that you do so. I hope this helps!