Google does crawl JavaScript, and they do index it. Googlebot is really a form of the Chrome web browser, so they will see the information that you give to them and most likely the other remaining content. Keep in mind that cloaking is against their guidelines, so may get the site penalized.

I would go ahead and give Google and all visitors the full content.

usDragons, the best way to deal with these links is to use Google's Disavow Links tool to disavow them.

First, you need to identify all of the links, and you an do that by downloading all your links from Open Site Explorer, Majestic.com, ahrefs.com, and Google Search Console. Combine the lists and remove the duplicates.

You'll want to manually review all of them, make a list of the ones you want Google to ignore, then upload a list of the domain names using Google's disavow links tool. Google has more info about their disavow tool here: https://support.google.com/webmasters/answer/2648487?hl=en

They certainly will make note of those phone numbers, but since the phone number is not a web page there's no way to pass on "link juice" to it. So, there's really no reason to mark it as a nofollow link.

Whenever you migrate a domain name to another domain name (I think this is what you're saying you did), Google will keep the URLs of the old domain name in their index for at least a year. That's if you migrate to a new domain name.

If the pages have 301 redirects to other pages on the site or new pages on the site, then those old URLs could still remain in the index for a period of time--you'll be able to see them if you search for the URL.

Typically even if those URLs are still indexed, it shouldn't be hurting rankings at all.

Brain, based on the example you provided, Google is correct--there is no proper meta description tag on those pages, so that's why they're not including your meta description tag. If there is no meta description tag, then Google will just show text from the page.

For example, the syntax of your meta description tag on the /7175 page is incorrect.

kfallconnect, if the 404 errors are being picked up as duplicate content, then most likely they're not actually showing up as 404 error pages. It's quite possible that it's a 404 error on the site (that's what the user sees) but, in fact, the server header is not displaying a 404 error. It could be showing up as a "200 OK".

First, I would identify the pages. If the user sees an error on the page, then that's fine. Use a server header check tool to see what the response code is when someone goes to the page. You can use something like Rex Swain's HTTP header tool to check it: http://www.rexswain.com/httpview.html . If the page shows a 404 error then you should be fine, it's not duplicate content.

If the page is showing a "200 OK" then it most likely IS duplicate content. If the page is showing an error to users but showing a '200 OK' in the server header, then that needs to be fixed.

But if the page is showing actual content (and not an error to visitors) then you need to look at potentially using the canonical tag or removing the content on the site completely (which is preferred).

Anoop, when a 'development' or 'preproduction' website or subdomain is getting indexed, that means that you haven't stopped the search engines from crawling it. The search engines, especially Google, are very aggressive at crawling, and they will crawl just about any URL that they find. It seems as though all you have to do is visit that page and it's going to get crawled.

Best way to stop Google from crawling (then indexing) a website is to stop it from getting crawled using the robots.txt file. Keep in mind, though, that even if you tell them to stay out of it using the robots.txt file they will still index those URLs.

The only way to stop Google from crawling would be to password protect the website or make it available only on a private server, or available via VPN only.

Typically no, LinkedIN decides whether or not the link is nofollow or not. But, if you share the article, and you put the URL in your description, it will be a "do follow" link.