What is "evttag=" used for?
-
I see evttag= used on realtor.com, what looks to be for click tracking purposes.
Does anyone know if this is an official standard or something they made up?
-
Well, it's certainly not an SEO thing.
In fact, it's not even a valid HTML thing; here are all of the craziest, acceptable attributes for a DIV in HTML5:
http://dev.w3.org/html5/spec/single-page.html#the-div-element
It among many, many other things, is breaking realtor.com's code through the validator:
In my experience, this one of the easiest ways to assure that Google can't crawl your site well, or put confidence in your user experience. Other crazy new standards, like schema.org do get pretty creative with structured data, but you'll notice that those use itemscope/itemprop/itemtype .... which do still pass the W3 validator:
http://schema.org/docs/full.html
In addition, there's no reference to an outside standard, even one that's totally foreign to what's generally accepted web development (similar to say, Facebook+OpenGraph, which is sometimes used, like this):
xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml" xmlns:og="http://opengraphprotocol.org/schema/">
I award realtor.com's web developers 0 points, and may the flying spaghetti monster have mercy on their SEO's.
To put that another way: don't copy this.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Using both .co.uk and .com
Hello a client has launched a website with both the .com and .co.uk The content is identical. I understand that you should add rel="alternate" hreflang="x" to the code. However, will there be a problem with the identical content? It would be hard to localise the content to one country. I understand why the client has got both domains, particularly the UK one but the actual content is not specific to one country. It is written for English speaking customers really. Also what about links? In this case do you need to build two sets of links to make them both rank? Thanks for any help.
Technical SEO | | AL123al0 -
Meta data & xml sitemaps for mobile sites when using rel="canonical"/rel="alternate" annotations
When using rel="canonical" and rel="alternate" annotations between mobile and desktop sites (rel="canonical" on mobile, pointing to desktop, and rel="alternate" on desktop pointing to mobile), what are everyone's thoughts on using meta data on the mobile site? Is it necessary? And also, what is the common consensus on using a separate mobile xml sitemap?
Technical SEO | | 4Ps0 -
Rel="canonical" of .html/ to .html
Hi, could you guys confirm me that the following scenario is completely senseless? I just got the instruction from an external consultant (with quiet good SEO knowledge) to use a rel="canonical" for the following urls. http://www.example.com/petra.html/
Technical SEO | | petrakraft
to
http://www.example.com/petra.html I mean a folder petra/ to petra is ok - but a trailing slash after .html ??? Apart from that I would rather choose a 301 - not a rel canonical. What is your position here?0 -
Using Rel Nofollow on Duplicate Pages
Hi there, I have a rather large site that has duplicate content on many pages due to how it's being spidered by google. I was hoping I could set the internal link to this page as "nofollow." My question is that I have hundreds of other sites with backlinks to these duplicate content pages.. will this affect me negatively if I tell google not to index the duplicated pages?
Technical SEO | | trialminecraftserverfinder0 -
Campaign Issue: Rel Canonical - Does this mean it should be "on" or "off?"
Hello, somewhat new to the finer details of SEO - I know what canonical tags are, but I am confused by how SEOmoz identifies the issue in campaigns. I run a site on a wordpress foundation, and I have turned on the option for "canonical URLs" in the All in one SEO plugin. I did this because in all cases, our content is original and not duplicated from elsewhere. SEOmoz has identified every one of my pages with this issue, but the explanation of the status simply states that canonical tags "indicate to search engines which URL should be seen as the original." So, it seems to me that if I turn this OFF on my site, I turn off the notice from SEOmoz, but do not have canonical tags on my site. Which way should I be doing this? THANK YOU.
Technical SEO | | mrbradleyferguson0 -
Which pages to "noindex"
I have read through the many articles regarding the use of Meta Noindex, but what I haven't been able to find is a clear explanation of when, why or what to use this on. I'm thinking that it would be appropriate to use it on: legal pages such as privacy policy and terms of use
Technical SEO | | mmaes
search results page
blog archive and category pages Thanks for any insight of this.0 -
Correct 301 of domain inclusive "/"
Do I have to redirect "/" in the domain by default? My root domain is e.g. petra.at
Technical SEO | | petrakraft
--> I redirect via 301 to www.petra.at Do I have to do that with petra.at/ and www.petra.at/, too?0