You can turn it off, just click on the pencil icon in the settings: http://i.imgur.com/EbxExC3.png

There is a possibility that Google will crawl a link in comments, it's happened before with comments in Javascript. However, it will not have any impact at all from an SEO perspective.

Gotta disagree with this one.  Creating high quality blog content with the same keywords you are targeting on your products page can be a good strategy.  The blog post will add more content related to your keyword on your site, increasing relevancy.  It's also a lot easier to build links to a blog than a product page.

Just make sure to link from the blog post to the product page, and the product page can get a boost.  If you rank really high in Google, you could even get 2 listings for that keyword.  If for some reason the blog content outranks the product page, you can just take that same content and throw it on the product page with a canonical from the blog post.  If all else fails, you can 301 redirect it.

Yes, suffixes matter, tenses matter, singular vs plurals matter. These are all different keywords. Search for "build" vs "building" in Google, and you will get different results. Look up the search volume in the Adwords tool, and you will see that the keywords have different search volumes.

TLDR: Yes, it matters. Choose the version that has the highest search volume or your customers tend to use the most.

That's an interesting question.  Semantic markup can be used to help Google understand what different pages are (i.e. tag pages), but it doesn't really solve the problems caused by duplicate content, namely:

1. Thin Content - Tag pages and other similar pages are thin content, with not much utility for the user, and are probably not going to rank well in Google anyway.  Even if they do rank, they won't convert as well as your main pages.
2. Keyword Cannibalization - Even if your tag pages & duplicate content rank, they could potentially outrank your main content, leading to lower conversions.
3. Panda - Too many thin content pages can lower Google's opinion of your site as a whole, leading to a Panda penalty.

Given the problems above, semantic markup doesn't really help with any of them.  Semantic markup can help Google understand what a tag page is, but that doesn't mean you want to have that page indexed.

Lots of people speculate that website usability impacts search rank, but this hasn't been conclusively been proven. Improving your website experience is great for conversions and something you should definitely work to improve, but if you want to improve search ranking it's still important to focus on content & links.

Try this:

<code># BEGIN WordPress  <IfModule mod_rewrite.c>  RewriteEngine  On  RewriteBase  /  RewriteRule  ^index\.php$ -  [L]  RewriteRule  (.+)/$ $1 [R=301,L]  RewriteCond  %{REQUEST_FILENAME}  !-f RewriteCond  %{REQUEST_FILENAME}  !-d RewriteRule  .  /index.php [L]  IfModule></code>

The title tag is one of the most important on-page factors that Google looks at. Every keyword you have in your title dilutes the value of all the other keywords, so you should stick to as few words as possible, plus maybe your brand name. This is also a good practice from a user experience perspective.

If you have tons of links in your navigation it may be helpful to use tools such as CrazyEgg or ClickTale to determine which of your links are actually being used. If you present the user with too many options, they can often be overwhelmed and take no action at all. If a link is in the sitewide navigation but isn't actually getting any clicks, remove it.

Agreed. You should describe what is depicted in the image using the alt tag-- this helps Google understand what the images is about and also helps people who are vision impaired or are using text-based browsers. The alt tag is also displayed in regular browser if an image fails to load for whatever reason, or if the user decides to turn images off while browsing.