Do not nofollow your social media profiles.

Adding nofollows to links does not increase your PR, it just eliminates the link juice that would have gone to those pages. Do not nofollow your own links or links to properties you manage. Only nofollow links if they are low quality sites, you have a commercial relationships with them, or they are competitors.

Linking to your social media profiles will also get them ranking higher in the search results for your brandname, which is a good thing if you maintain good social media profiles.

I've worked with a number of ecommerce sites... my recommendation would start by fixing on-page factors first. Just basic stuff like titles, image alts, URLs, semantic markup, etc. Fix it at the template level, so it's taken care of site-wide.

Site architecture is key with a large site, so make sure that your site is laid out properly. Mostly this means making sure your categorization/organization makes sense, making sure all your content is being linked to, and eliminating duplicate content issues.

Once all the on-page stuff has been taken care, I would focus on link building. Building links to an ecommerce site is not easy, but it's doable. Start by taking a look at some of your competitors, to see where they are getting links. As an ecomm site you can also take advantage of things like giveaways and contests to attract links. Leverage your blog to get guest bloggers.

Here's a good list of link building ideas, if you need more:

http://pointblankseo.com/link-building-strategies

It likely means the page that the link was discovered on is now redirecting to another page. For example, a few of the links in your screenshot are from Google+, which no longer exists (all pages now redirect to a shutdown notice).

You can start by trying the "site:domain.com" search. This won't show you all the pages which are indexed, but it can help you determine which ones aren't indexed.

Another thing you can do is go into Google Analytics and see which of your pages have not received any organic visits. If a page has not received any clicks at all, there's a good chance it hasn't been indexed yet (or just isn't ranking well).

Finally, you can use the "site:domain.com/page.html" command to figure out whether a specific page is not being indexed. You can also do "site:domain.com/directory" to see whether any pages within a specific directory are being indexed.

Not really. Google only shows referrers as (direct) when there is no referral data present, and that's an issue with the referrer, not your tracking system. Referral data can be lost for many reasons:

• The user is getting to your site by typing the URL directly into their browser
• The user is getting to your site via a bookmark or browser favorite
• The user is using iOS6, which doesn't pass referrer data properly for search traffic
• The user is clicking on a link from an e-mail client which doesn't pass referrers (common if you have mailing list)
• The site that is linking to you is using HTTPS, and you are using HTTP
• Traffic is coming via a mobile app that doesn't pass referrers
• The user is using IE and they clicked on a Javascript or Flash link
• Etc.

You may be able to get around this to a certain extent by using URL parameters (utm_source, utm_campaign), but those would only be for links that you have some control over.

There are a bunch of sites that offer this service such as Alexa, Compete, Google Trends, etc. but none of them are close to accurate. But they can provide very rough ballpark figures as well as relative popularity:

http://moz.com/blog/testing-accuracy-visitor-data-alexa-compete-google-trends-quantcast

Another option, which is more time consuming but potentially more accurate, is to do some research on the site, and identify their top keywords. The Google Keyword Planner can help you with this, just pop in the URL and it will show you the keywords that the site is optimized for.

Then run the keywords through a rank checker and combine that data with estimated click through rates and the search volume for the keywords to estimate how much traffic they are getting. Multiply that number by 10 to account for long tail variations, and that will give you an estimate of their total traffic. Paid tools such as Linkdex can help with this.

Hey Samantha, having text in rollovers should not  be an issue unless you are deliberately being spammy or trying to trick Google about what your page is about.

Modern web design incorporates many design elements that are hidden until the user interacts with them, such as: drop down menus, sliders, contextual help, slideshows, etc. Google understands that these are legitimate ways of presenting content to users, and not a blackhat tactic to spam keywords.

There's always the chance that hiding text could inadvertently trip Google's spam filters, but many of the most popular websites incorporate these design features, and the risk should be minimal.

The meta description is the description that is usually displayed in the search results (usually, because Google can change it to whatever they want). It has absolutely zero impact on your SEO rankings. What you want to do with the meta description is make it compelling so that people will click through to your site. Approach it like you approach writing copy for an Adwords ad.

The excerpt (I'm assuming you're using Wordpress) is the snippet of text that appears on category pages and other archive pages on your site. Usually, this is just the first several lines of your post, but you can customize this to be a short summary of the content of the post. The summary approach is better from an SEO perspective since it is unique content, and may be a better experience for your users as well. However, writing a custom excerpt for each and every post can take time & resources, so you'll have to decide for yourself whether it's worth the effort.

The title attribute does not have any SEO value for links (or images, for that matter). Links can influence click behavior for users, which may indirectly affect SEO, but it has no direct impact on rankings.

I would say in general links from within a post/article carry more weight than sidebar links. Sidebar links have been devalued quite a bit by Google, and with Penguin you could even potentially be penalized for a sidebar link on a site with thousands of pages. With that being said, I would not turn down a sidebar link from a high authority site if offered one.

PR can be deceptive because it hasn't been updated in nearly a year. So a site can still be high quality even if the toolbar PR shows a 0. It's always nice to get links from sites that are already ranking for your keyword, but make sure to do a thorough backlink analysis first to make sure they aren't spamming their way to the top. If the #1 result is using black hat tactics, it could take your site down with them when they inevitably get penalized down the line.

Directory links don't pass much link value, but it can still be useful to be listed in the top directories for local citations. Yext can automate the process if you're short on time & resources, but you can also submit to the directories manually for full control of the process.

They even provide a list of all the directories they submit to:

http://www.yext.com/blog/tag/business-directories/

If you're already translating the content, it makes sense to translate the URLs as well as part of the process. Think about it, for a non-English speaker the English URLs are effectively gibberish. It would be like if you were given a URL that was in Chinese or Korean. Aside from being a poor user experience, it's not optimal from an SEO perspective as well, as keywords are going to change from language to language, so keeping the English words doesn't make sense.

Re-writing so many product descriptions is a big task. I would first see if you can combine any of the products into a single page.

For example, if you have "12 inch red kite" and "18 inch red kite" and the products are identical except for the size, create a single product page with a dropdown to select the size. If your CMS doesn't allow you to do that, you can create a separate page and canonical the other pages to it. That way, you reduce the amount of unique content you have to write.

Getting user generated content from things like reviews can also help streamline the unique content creation. Incentivizing customers with coupons is a great way to have them coming back to your site and leaving a review.