I did a quick SEO analysis on priceonomics.com. Most of these tips fall into the 20% category. Maybe they can use some of these tips to perfect their SEO strategies.<p>1. Blog on a subdomain.<p>Though sometimes easier for administration, subdomains might dilute your SEO efforts. Links to a subdomain don't count 100% as links to your main domain. A /blog/ could help with the generation of incoming links and addition of fresh content to the domain you want indexed a lot.<p>2. Employ Canonical<p>www. redirects to non-www. Trailing slashes get added automatically. So far so good. But it is still easy to create duplicate URL's by adding random dynamic variables.<p>Without Canonical an URL like /boats/?dupe=content will point to the same resource as /boats/. Here you might introduce a canonical problem. (<a href="http://googlewebmastercentral.blogspot.com/2009/02/specify-your-canonical.html" rel="nofollow">http://googlewebmastercentral.blogspot.com/2009/02/specify-y...</a>)<p>3. Optimize your site for speed<p>Though not that many search queries are affected by the site-speed algo, site speed remains very important for your visitors, and so indirectly for your SEO/marketing efforts. Google Site Speed plugin, Yslow or these guidelines (<a href="http://developer.yahoo.com/performance/rules.html" rel="nofollow">http://developer.yahoo.com/performance/rules.html</a>) might help you fix some of these issues and gain a few seconds.<p>Mostly loading javascript just before </body>, turning on caching, and compressing and combining resources.<p>4. Robots.txt vs meta robots<p>/search is disallowed in robots.txt. If you disallow it on a page basis, with meta robots, you can specify: "noindex, follow". That way if people link to your search results, link juice will keep flowing through your site.<p>5. Breadcrumbs<p>Add rich snippets mark-up. For product information and reviews, but an obvious contender is the breadcrumb. Link to your twitter (and future Google+ profile) with 'rel=me' to signify ownership of your graph.<p>6. Images<p>Add an alt-attribute to the site logo. Specify the dimensions for faster rendering.<p>7. Don't critique ehow.com if you fill Google's index with 245.000+ automated results.<p>Or put less bluntly: Write more unique content to introduce bigger categories. Add more relevant content to your listings (reviews, search/trend data, price watch).<p>8. Make clear if an item is "already sold".<p>If I click on 10 entries and I get 10 times "item already sold" I start to doubt the usefulness of the application. I compare this to a job site, where the jobs are mostly filled: You happen upon
such a site through Google, because Google still thinks these listings are relevant.<p>9. Quality<p>The site is mostly void of trust factors. Due to some listings being in ALL-CAPS, some result pages can look a bit spammy. Add more trust factors, and try to repair spammy listings.