Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Is DOCTYPE important for SEO?
-
Hello fellow Mozzers.
I am just having a brief look at a potential clients website before speaking to them tomorrow and whilst looking at the source I noticed that they don't appear to have a clear definition for their Doctype.
All the have at the top of each page is
I have to admit that Doctypes aren't my strong point but I know that they are normally slightly more descriptive than this.
Can this have any effect on rankings? or is this just an issue for W3C validation?
Thanks

-
If it is an HTML 5 page that should be just fine as it is the HTML 5 doctype tag.
Check out the info here: http://www.w3schools.com/html5/tag_doctype.asp
It might cause trouble with really old browsers, but if they have that going I would hope they have already thought about the reasons for and against using it

EDIT: even better link: http://www.w3.org/TR/html5-diff/#doctype
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
-
Why is pagination SEO such a mystery in 2021?
Hi folks. I would like to discuss pagination. I use WordPress (Genesis, specifically). I ran my site through a site scan and it flagged an error which told me that my blog was producing duplicate meta descriptions because the blog is paginated - the same meta description from the blog page is being used on Page 2, Page 3 etc. I looked into this and the Internet is awash with many other people scratching around for a solution. My understanding is that using a canonical link on the first page is not a good idea, because it says to Google that only Page 1 of the blog is important. I also read an article that states Google no longer reads the Rel=Prev/Next code that could be used to tell Google to ignore the issue. So, what's the solution? Do I even need one? As a side-thought, it seems to me that pagination is, well, pretty useless. I mean, if my blog has 20 pages and I've worked hard to create content, who is going to click through to anywhere near page 20? Nobody. There has to be a smarter way for people on-site to access content. I would love your thoughts on all of this. Cheers.
Intermediate & Advanced SEO | | Nobody16165422281340 -
How important is admin-ajax.php?
Hi there! It's been a long time since I last did a technical audit of a site. I've currently playing with the 'fetch as google' tool to find out if we're blocking anything vital. The site is based on Wordpress, and after a recent hacking incident, a previous SEO moved the login portal from domain.com/wp-admin/ to domain.com/pr3ss/wp-admin/ - to stop people finding it. Fair enough. But they then updated the robots.txt file to look like this: User-agent: *
Intermediate & Advanced SEO | | Muhammad-Isap
Disallow: /pr3ss/wp-admin/ Now, some pages are trying to draw on theme elements like: http://www.domain.com/pr3ss/wp-admin/admin-ajax.php
http://www.domain.com/pr3ss/wp-content/themes/bestpracticegroup/images/column_wrapper_bg.png And are naturally being blocked (not that this seems to affect the way pages are rendering in Google's eyes) A good SEO friend of mine has suggested allowing the theme folder, and any sub folders where this becomes an issue. What are your thoughts? Is it even worth disallowing the /pr3ss/wp-admin/ path? Cheers guys and gals! All the best, John. I've found a couple of the theme's0 -
Are these URL hashtags an SEO issue?
Hi guys - I'm looking at a website which uses hashtags to reveal the relevant content So there's page intro text which stays the same... then you can click a button and the text below that changes So this is www.blablabla.com/packages is the main page - and www.blablabla.com/packages#firstpackage reveals first package text on this page - www.blablabla.com/packages#secondpackage reveals second package text on this same page - and so on. What's the best way to deal with this? My understanding is the URLs after # will not be indexed very easily/atall by Google - what is best practice in this situation?
Intermediate & Advanced SEO | | McTaggart0 -
SEO time
I wanto to be in the top of the google search. I am usiing a lot of SEO tools but... I have done it during one month. Do I have to wait more?
Intermediate & Advanced SEO | | CarlosZambrana0 -
Is CloudFlare bad for SEO?
I have been hit by DDoS attacks lately...not on a huge scale, but probably done by some "script kiddies" or competitors of mine. Still, I need to take some action in order to protect my server and my site against all of this spam traffic that is being sent to it. In the process of researching the tools available for defending a website from a DDoS attack, I came across the service offered by CloudFlare.com. According to the CloudFlare website, they protect your site against a DDoS attack by showing users/visitors they find suspicious an interstitial that asks them if they are a real user or a bot...this interstitial contains a Captcha that suspicious users are asked to enter in order to visit the site. I'm just wondering what kind of an effect such an interstitial could have on my Google rankings...I can imagine that such a thing could add to increased click-backs to the SERPs and, if Google detects this, to lower rankings. Has anyone had experience with the DDoS protection services offered by CloudFlare, who can say a word or two regarding any effects this may have on SEO? Thanks
Intermediate & Advanced SEO | | masterfish1 -
Using WP All Import csv import plugin for wordpress to daily update products on large ecommerce site. Category naming and other issues.
We have just got an automated solution working to upload about 4000 products daily to our site. We get a CSV file from the wholesalers server each day and the way they have named products and categories is not ideal. Although most of the products remain the same (don't need to be over written) Some will go out of stock or prices may change etc. Problem is we have no control over the csv file so we need to keep the catagories they have given us. Might be able to create new catgories and have products listed under multiple categories? If anyone has used wp all import or has knoledge in this area please let me know. I have plenty more questions but this should start the ball rolling! Thanks in advance mozzers
Intermediate & Advanced SEO | | weebro0 -
Subdomains and SEO - Should we redirect to subfolder?
A new client has mainsite.com and a large numer of city specific sub domains i.e. albany.mainsite.com. I think that these subdomains would actually work better as subfolders i.e mainsite.com/albany rather than albany.mainsite.com. The majority of links on the subdomains link to the main site anyway i.e. mainsite.com/contactus rather than albany.mainsite.com/contactus. Having mostly main domain links on a subdomain doesnt seem like clever link architecture to me and maybe even spammy. Im not overly familiar with redirecting subdomains to subfolders. If we go the route of 301'ing subdomains to subfolders any advice/warnings?
Intermediate & Advanced SEO | | AndyMacLean0 -
Migrating online store to subdomain using shopify and effects on seo and energy down the road for seo
I'm looking for some clarity... Looking at using Shopify for an existing online store that we have to migrate. Setting up the store with shopify means we will be using a subdomain such as shop.mywebsite.com instead of mywebsite.com/shop. The following are points to consider when responding The client currently has an online store, however it's a proprietary shopping store and CMS that has since gone defunct and they need to migrate to an alternative in order to survive online against new CMS systems that allow the site and its content to be better optimized. There is a lot of existing SEO done on the current site that we don't want to loose PR on. There is roughly 2000 products Client has a fixed budget, dealing with checkout issues, custom work and various other "bugs" seems to be easier controlled with Shopify...thus budget can be used more on content/strategy and migration We want to run the main site in Wordpress and are wanting to use Shopify since it supports a gateway, has great features and seems like it would allow us to get more bang for the buck and can focus more on the main site and content strategy and drive traffic to the subdomain store if needed Or main concern is the effort of migrating 2000+ products to shopify and the traffic and PR it gives the current site will have a negative effect on the main domain itself. Should we really be considering this path? The domain is diveidc.com One main benefit to the subdomain is the ability to clearly segment products from the service portion of the site in the analytics and focus 2 clear strategies and track it in a very defined manner. We're really on the fence with this...any thoughts are welcome.
Intermediate & Advanced SEO | | MAGNUMCreative0