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Personally i no-index follow those "category" pages when they are just list pages of blog posts..
I also do this on certain e-commerce categories. Brand pages or collection pages i keep indexed. but the page where its jus another list of several products without clear added value content on them just no-index follow them!

You know link building via comments is not really appreciated by google right  https://www.seroundtable.com/link-comment-spamming-12856.html.

other ways google+ and other social mentions are a important factor. but really link building is not going to work this way. For starters everything is nofollowed. Second these selve created links aren't organic and thus powerfull links at all. and second i dont see much of links getting greatly indexed.

Its a great way of building awareness when doing it relevant and adding value with your comments and links and that way create more exposure for your content but directly link-building the good way. no a smart idea

Cheers!

No not really. Be aware that you make good keyword groups. for example. if you are targeting fruit and have keywords like "buy fruit, buy fresh fruit, good fruit, fruit products" but also "apples, good apples"
Don't make 1 campaign or one big list.
separate those.

This can even go further, personally i make groups for almost al different keywords. "Fruit shop" and "fruit store" are in my case in different add groups.

If you follow that way, your unlimited in number of words. and its still with a clear and clean overview.

The reason it shows is probably because your Analytics code is also copied and therefor showing up.
in the long term this could give a small problem with duplicated content. while if your site stays a better, more popular site it won't affect you hugely, but try to contact the domain owner, or the hoster of this fraud website. and that way try to get the site taken down.

first of all it looks really spammy to me and probably to customers as well. All though a few months/years back i would say a No No don't do it. But nowadays you see google just no caring to much about stuffen. but from a certain point google just does not add any value to the 20th time a name is mentioned for example.

I would worry more about the looks of it. it looks very spammy to me.

Normally not, when there are followed links pointed from the njoyn.com domain towards the new rewritten url it does. but i do believe that when the url is just rewritten from a big DA domain to a new domain that this won't impact much.

But the DA is just a main score for the entire root domain and does not directly mean that the subdomain has huge importance or authority. This would mean that if you start a example.wordpress.com blog that it would give you huge benefits right away. More about DA on http://moz.com/learn/seo/domain-authority

This is one of the great joys of Magento. Luckily we are magento specialists here to help

First be sure that you setup the canonical URL setting for category pages! 
in System->Configuration->catalog->SEO

Second Noindex,Follow al filtered view (has to be done with a technical change, if you need help contact me)

You can also read this great resource by Yoast.

There is so much more to investigate to pinpoint this issue, to really wrap your head around it you should check things like inbound links, address/company cites around the web, maybe even compare the MOZ statistics like DA and PA how well pages are scored. before getting a little bit better understanding if A really out performance B but doens't rank well as B, then there is a big change there is something else at play, maybe preffering the other because of better, more unique content?

Of course. the moz tool Open Site Explorer is perfect for that! And also the fresh web explorer is a great tool as well to find the newest links to you or to your competitor.

For more info checkout this video on the OSE tool.

in my opinion it's not really that important.. as long as all pages are in the sitemap. It's more the way of organizing and generating the site maps which is interesting. Normally id say. For smalldr shops get a static pages a categories and a products per category site map. For larger sites just make 3. Static pages. Categories and products.

Hope this helps

No i'm sorry i will clarify. What i ment was more "if i think logically i do not think it will give you any benefits"

The example mentioned that if that where true, everyone would start a wordpress.com blog instead of there own site because there Top domain already has superb scorings.

Hi,

this goes indeed pretty deep, but its perfectly possible with an extra little tool which you already mentioned. The paid version of Screaming Frog gives you a lot of information, and with a little digging it gives you perfect outbound link profiles of sites. but a lot of data needs to be crawled so thats why you need the paid version.

Do you want To rank for these pages? Then you would need to simply add more unique content. video descriptions. Excerpts tags, owner profile and so on.

if not you could fix It with canonical

No problem. good luck

Yes it can surely pinpoint more powerfull link opportunities vs the spammy ones, but to be honest, for each link this will cost you a lot of time. i think a good mix of great links with a few one on spammy sites which are not clearly super spammy (else you see it with your plain eye aswell) is not that horrible.

Thats done automatically. Check the source of the page and you'll see

Good luck!

Yes i've seen this numerous of times. Is it just 404's are are there also things like DNS playing along?
But if the amount of 404's jump up really high then for sure google turns down the speed. i guess this gives you some air to fix it in time.

Will it help, sure it will get your site more attention, and rank probably a little better, but due to the lack of relevancy don't expect the world of it. But if they are your own site, maybe you could create a page where you talk a bit more about the relation between company X and Y and then link to it to make the relevancy a bit better.

I think there are 2 things you could do here.

1. Update the content, if a new product comes out and you want to add a updated version just update the video, i don't use youtube that much but this was always perfectly useable.

2. Else in your first line on the description link to your newer content and tell there is an update. Maybe also with a annotation you can link towards it.

You are already answering it yourself a little. iFrames are really bad practice and can through-off search engine bots. If you say the content in the frames are all the same a few alarm-bells go off as well. Why would you want to use frames anyways? maybe you can clarify that a little or show us a the example so we can make the advice a little specific what to do next.