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.
Speed benefits from loading images from a subdomain
-
I have read that loading images from a subdomain of your site instead of the main domain will give you speed benefits on load time. Has anyone actually seen that to be the case? Thanks!
-
Thanks for the helpful advice!
-
If you are talking about using a cookie-free subdomain, that can definitely have an impact on site speed:
http://developer.yahoo.com/performance/rules.html#cookie_free
Just using a subdomain won't have any benefit, and may even slow things down. Using a CDN for images and other components is usually the quickest and easiest solution for most sites.
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
-
Google image search filter tabs and how to rank on them
I have noticed Google image search has included suggestion tabs (e.g,. design, nature... when searching background) on the top of the image search.
Technical SEO | | Mike555
Are there specific meta tags I can add into my images so that my images will show up on each tab?
Do those filters just show content based on image keywords or something else? IRme7gQ0 -
Hosting images externally
In these days of CDNs does it matter for SEO whether images (and PDFs etc.) are hosted off-site? Does it make a difference if images hosted on Flickr, photobucket etc. Thanks
Technical SEO | | bjalc20110 -
Images on sub domain fed from CDN
I have a client that uses a CDN to fill images, from a sub domain ( images.domain.com). We've made sure that the sub domain itself is not blocked. We've added a robots.txt file, we're creating an image sitemap file & we've verified ownership of the domain within GWT. Yet, any crawler that I use only see's the first page of the sub domain (which is .html) but none of the subsequent URL's which are all .jpeg. Is there something simple I'm missing here?
Technical SEO | | TammyWood0 -
Reverse proxy a successful blog from subdomain to subfolder?
I have an ecommerce site that we'll call confusedseo.com. I created a WordPress blog and CNAME'd it to blog.confusedseo.com. Since then, the blog has earned a PageRank of 3 and a decent amount of organic traffic. I am considering a reverse proxy to forward blog.confusedseo.com to confusedseo.com/blog/. As I understand it, this will greatly help the "link juice" of the root domain. However, I'm concerned about any potential harm done to the existing SEO value of the blog. What, if anything, should I be doing to ensure that the reverse proxy doesn't hurt my "juice" rather than help it?
Technical SEO | | bedbugsupply0 -
For an image which is in the CSS and not the HTML, can you add an alt tag?
I would like to improve SEO on a page with three big images, which are currently hosted in the CSS. The sample I am working with is at http://xquisitevents.com/about-us/ and I put my cursor over the big picture of the wedding dress with bouquet, I inspected the element and saw this code in a div tag: #upperleft { background-image:url(images/AboutTopLeft.jpg); Can I add an alt tag to the CSS somehow, or can I have it added to the HTML? What is the best way to handle this, to include keywords like exquisite weddings and special event designs?
Technical SEO | | BridgetGibbons0 -
Can hotlinking images from multiple sites be bad for SEO?
Hi, There's a very similar question already being discussed here, but it deals with hotlinking from a single site that is owned by the same person. I'm interested whether hotlinking images from multiple sites can be bad for SEO. The issue is that one of our bloggers has been hotlinking all the images he uses, sometimes there are 3 or 4 images per blog from different domains. We know that hotlinking is frowned upon, but can it affect us in the SERPs? Thanks, James
Technical SEO | | OptiBacUK0 -
Do knowledge base plugins on a subdomain have seo benefit?
Hi SEO Moz, We want to use a knowledge base plugin (cheaper & faster than building it ourselves) where we can have Q&As for our website. We want this to help with our SEO by adding in our keyterms that we want to rank for. We've looked into TenderApp & Get Satisfaction which look like good solutions - however, as they're both on a sub-domain do we get any seo benefit from this? When people link to our knowledge base, will this help our website at all - or is the benefit going to go to TenderApp/Get Satisfaction? For instance - Our website URL is http://widget.products.com The KB URL is http://widgetsupport.products.com If the above plugin is not a good solution, is there anything else that is better? Any help will be greatly appreciated!! Thanks.
Technical SEO | | qdigi0 -
Image search and CDNs
Hi, Our site has a very high domain strength. Although our site ranks well for general search phrases, we rank poorly for image search (even though our site has very high quality images). Our images are hosted on a separate CDN with a different domain. Although there are a number of benefits to doing this, since they are on a different domain, are we not able to capitalize on our my site's domain strength? Is there any way to associate our CDN to our main site via Google webmaster tools? Has anyone researched the search ranking impacts due to storing your images on a CDN, given that your domain strength is very high? Curious on people's thoughts?
Technical SEO | | NicB10