MozBar extension, available free for Google Chrome and Mozilla Firefox shows you information about how a website is applying SEO techniques.
MozBar looks at website’s SEO aspects while you navigate on them. This way you can figure out how your competitors and top-ranked websites work optimization techniques. This information can be used as reference for you to apply in your own website.
The extension shows the loading time spent in each page (the lower the better), social media shares, internal and external links, page title and other tags, among much more information. In short: MozBar is the fastest solution to give general information about how a website is working it SEO, including yours.
Free sites built with Site.co come with WordPress SEO plug-in, which helps you optimizing the pages for getting good ranks at Google results. Site.co also gives a free e-mail account and the chance to use your custom domain name.