Technical SEO archives

Cloak your sitemap!

7 May 2007 by Joost de Valk » - 10 Comments

There’s a discussion on Webmasterworld as to whether XML sitemaps are a welcoming door for scrapers. Especially with the new autodiscovery feature for sitemaps around, it becomes very easy for a scraper to find any and all URL’s in your site. So in my opinion, they are a bit too warm of a welcome. Tedster »

Category: Technical SEO

nofollow is NOT meant for editorially reviewed links

2 May 2007 by Joost de Valk » - 24 Comments

Imagine you’re like me, and you like WordPress so much that you write plugins for it. People start writing about these plugins and they, of course, link to you. You see these pages writing about you show up in your referrer stats and of course you go and have a look at what they’re writing »

Category: Technical SEO

Optimize your shopping cart in 5 steps

22 April 2007 by Joost de Valk » - 25 Comments

A friend of mine was adding a shopping cart to his site, and wanted some advice on how to optimize his shopping cart. I thought: why not give the advice I gave to him to all my readers as well? So here we go, a complete article on shopping cart SEO. Step 1.: Make sure »

Categories: eCommerce, Technical SEO

How to prevent Google from indexing script output

11 April 2007 by Joost de Valk » - 1 Comment

If you have some scripts on your site like, for instance, my domain-info script, you often use GET parameters so people can link to them or bookmark them. This has a lot of benefits, but it creates a problem as well. Search engines will index this output, causing your server to use cycles for something »

Category: Technical SEO

PHP 301 redirects for Apache and IIS

2 April 2007 by Joost de Valk »

This one is just here for my own reference, because the default 302 status code just isn’t good enough! PHP 301 for Apache: PHP 301 for IIS:

Category: Technical SEO

Why Google doesn’t like frames in your sites

2 April 2007 by Joost de Valk » - 9 Comments

I’m currently working on a site for a client who has a site which uses frames, and he asked me why Google always linked to the “wrong” page. He did not build this site himself of course, and hasn’t got much of a clue as to how HTML works, let alone search engines. He asked »

Category: Technical SEO

Convert underscores to dashes with Apache mod_rewrite

25 March 2007 by Joost de Valk » - 1 Comment

Update: (Aug 4 2007) the stuff below is no longer necessary, all major search engines now treat underscores and dashes exactly the same, as word separators! A year or so back, I was using underscores in my URL’s on this site for spaces, and I decided to switch them to dashes, since several people, including »

Category: Technical SEO

Trailing double forward slashes in URL’s in the SERPs…

17 March 2007 by Joost de Valk » - 8 Comments

This query gives a result I hadn’t seen before (image), the same page was indexed with both a single trailing forward slash, which is of course normal, and with a double trailing forward slash… This is of course a duplicate content issue, especially when people link to the double slash one by accident. The fix »

Category: Technical SEO

IP-delivery or cloaking: useful, but do you WANT to use it?

23 February 2007 by Joost de Valk » - 9 Comments

My friend Jaimie Sirovich sent me a chapter of his upcoming techy SEO book. More specifically, he sent me the chapter on cloaking, geo-targeting and IP-delivery. It’s a fun read, and his example scripts are very, very complete and work nicely.

Category: Technical SEO

You can add your URL’s to DMOZ again!

13 January 2007 by Joost de Valk » - 18 Comments

DMOZ has now fully recovered from the enormous crash, as you can now suggest your own sites for the directory again! So feel free to go in there and add your URL’s :). Update: not completely recovered, you still can’t apply to become an editor.

Category: Technical SEO