PageRank is Google’s opinion of the importance of a page based on the incoming links from other sites. (PageRank is an important signal, but it’s one of more than 200 that we use to determine relevancy.) In general, a link from a site is regarded as a vote for the quality of your site.

Google works very hard to make sure that actions on third-party sites do not negatively affect a website. In some circumstances, incoming links can affect Google’s opinion of a page or site. For example, you or a search engine optimizer(SEO) you’ve hired may have built bad links to your site via paid links or other link schemes that violate our quality guidelines. First and foremost, we recommend that you remove as many spammy or low-quality links from the web as possible.

If you’ve done as much work as you can to remove spammy or low-quality links from the web, and are unable to make further progress on getting the links taken down, you can disavow the remaining links. In other words, you can ask Google not to take certain links into account when assessing your site.

HTML5 Microdata is an easy way to add semantic markup to your web pages. Search engines rely on this markup to improve the display of search results, making it easier for people to find the right web pages.

Here is a simple example of how to use HTML5 microdata in your contact web page:

<div itemscope itemtype="http://schema.org/Person">

   <span itemprop="name">CNERIS CNERIS</span>

   <span itemprop="company">The Example Company</span>

   <span itemprop="tel">604-555-12134</span>

   <a itemprop="email" href="mailto:This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.</a>

</div>

In order to pass this test you must consider using a 301 re-write rule in your .htaccess file so that your site's IP points to your domain name.

If your site is running on apache server, you could put these lines in your .htaccess after RewriteEngine on line:

RewriteCond %{HTTP_HOST} ^XXX\.XXX\.XXX\.XXX

RewriteRule (.*) http://www.yourdomain.com/$1 [R=301,L]

Note that you must proper format the first line using your IP (replace X characters with proper digits from your IP) and the second line using your domain name.

You must consider using a 301 re-write rule in your .htaccess file so that both addresses (http://example.com and http://www.example.com) resolve to the same URL. 

- If you want to redirect http://www.example.com to http://example.com, you can use this:

RewriteCond %{HTTP_HOST} ^www\.example\.com$

RewriteRule ^/?$ "http\:\/\/example\.com\/" [R=301,L]

- If you want to redirect http://example.com to http://www.example.com, you can use this:

RewriteCond %{HTTP_HOST} !^www.example.com$ [NC]

RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]

Note that you must put the above lines somewhere after RewriteEngine On line.