In Webmaster Tools go to Health >> Fetch as Google and check your homepage as well as a few others indicated in your problem.  If they can be fetched then Google can crawl your site ok.  This will not effect your PR.

I have run the site through ScreamingFrog.  You have masses and masses of 301 redirects going on which you need to resolve.  It looks like you could have some permalinks issue going on.  What do have set in Settings >> Permalinks?  I'd also look at installing Yoast Wordpress SEO as I recall there are options in there to handle permalinks as well.

That is definitely a 301 redirect to the trailing slash URL.  Good tool to check with is Fiddler.

Unless you have amended the htaccess file directly then a plugin must be making this setting, possibly something like the Robots Meta plugin.

Just as menu options I don't see why those links would not be crawled.  What you can have problems with is if those elements expanded to reveal text and then it all depends how those elements are coded.  If there are controlled by javascript there is a possibility Google will not read.

So in that case using your example: googling  cache:http://www.tesco.com or disabling .js in the browser will indicate what can be crawled.

It depends how many visitors hit that landing page on that day.  In Analytics if you drill down Content >> Landing Page to the page in question then Secondary Dimension select say keyword that may give you a clue.

Otherwise if you have an event set up for the contact from that specific page you can track back to the source.

Without delving too deeply it may be your link profile, especially if you have bombed in the past few days.

You have a lot of forum links. There are also directories and article submission sites.  One site in particular A Seek is a database of suppliers for products searched for.  If the product is not available there is no 404 page rather the same homepage view, so effectively you are part of what may look to Google as mass page 'advertising' as your link as well as all the other suppliers appears wholesale.  These all make up the backbone of your link profile and if not the cause I would be very nervous leaving as is.

Did you follow through to this - http://moz.com/blog/googles-multi-week-algorithm-update

May be of help?

Chasing the domain authority for links is not really as straight forward as that.

1. Domain has DA of 50 but not really related, is starting to crack with poor content etc
2. Domain has DA of 15 is spot on in terms of directly related content and quality.  It's a new site and looks like it will develop.
3. A good link profile will have a natural mix of low to high DA, with an upturn for the most common 30-50 DA.  This will include a good sprinkling of no-follow.  When researching I tend to filter 25+ but keep an open mind on everything.

For cleaning up a profile you can't look at those measurements, you need to go into each site and manually check out it's content and history, its own link profile and make a judgement if you are in the right neighbourhood. Of course directories, 'comments' links and badly placed 'articles', thinly veiled paid for (do-follow) are much easier to weed out.

I completely agree with Sheldon.  I've been in the position to pre-empt a potential slap by requesting removals (repeatedly) then Disavow.  I am no expert but in my opinion as long as there are removal requests as backup and to put in Sheldon's words the pruning is for health and diseased reasons rather than purely ornamental it shows good intent.

yep, didn't even get to anchor text.  Absolutely right, this has been spanked for all the reasons you can get spanked.

How many URLs are indexed in Google if you use site:yourdomain.com  Has that figure dropped too?

Have you got anything in your robots.txt that could be blocking?

If you have changed servers I would double check a few things.  This is stuff to rule out:

• Page load speed should be good
• All your pages are still indexed in Google
• There are no warnings in Google Webmaster Tools
• Have a look through your link profile - if the majority of links are to non www then the 301s will shave an edge off the link value from those links.  You are right to do the 301, so if this the case see if you can update those links.
• Have you implemented any other internal 301s to new URLs

I don't know what the image is but I would imagine it is likely to be promoting the site somehow. If that's the case it must be no-follow.

There may have been a couple of small updates on the 20th and around 27th Oct, which may have impacted your site.

However, there are lots of things to look in to.  For example, how much organic traffic has physically dropped in Google Analytics?  Are the drops in keywords in the main results or featured snippets?  Have conversions been impacted? Have any changes been made to the site in the past couple of months?  Have your competitors been impacted?  Is your link profile clean? Do you have pages competing against each other.  There are multiple things to start analysing and to look for clues from.

I think you mean the other way round.

If you have a new site and you get a link from an authority site the chances are that site page might (and it is a might) get crawled more often, which then leads Google back to your site and stands you in good stead for Google to crawl and index your site.  Other methods include submitting your sitemap to Webmaster Tools.

If good quality sites are linking to yours then that's great as it's telling Google your site is of value and will help with your rankings.  You do not want to link back to those pages, you want to go out and find more sites to link to you.

If it is the case that no URL for .us should exist (there are not new URLs) then you can remove pretty swiftly in Webmaster Tools >> Google Index >> Remove URLs >> select the root URL and select to remove all directories that come from it.

The first way is not to spam your keyword on here.

I would try and map each URL of each community site to a corresponding URL within the regional site where possible, rather than pass all link juice to just the homepage.

Something like:

RewriteCond %{HTTP_HOST} ^www.communityx.com$ [NC]
RewriteRule ^/some-directory/$ http://www.regionaly.com/new-directory{ [R=301,L]

This is not implemented.  You have both www and non www URLs along with /index.php for the homepage.  This needs to be implemented in your htaccess file with something like (ensure you backup existing file):

Redirect non-www urls to www

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www.4cabling.com.au
RewriteRule (.*) http://www.4cabling.com.au/$1 [R=301,L]

Remove index from URL

RewriteRule ^(.*)index.(htm|html|php)$ http://%{HTTP_HOST}/$1 [R=301,L]

Your page load is woeful and you need to address - https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2F4cabling.com.au%2F&tab=desktop

Also, you have not got canonical tags set up for each page which I would recommend

"As it's a sidebar link, it shows up for every page on the site (easily thousands due to all posts having a page, tags, categories etc)."

Irrespective of Googles stance on sitewide links you have to ask yourself does that look natural and is the link there to offer value to the visitor.  Invariably it looks spammy and planted - and ignored.

I would definitely avoid without no-follow.