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Obviously I don't know the exact structure of your site, but I can't see any difficulties with SEO.  I doubt any content behind a password would be found, the only thing to consider is the login page, depending on the use you could block it in robots.txt.

I think mostly Google see subdomains as different sites, depending on how they are linked together.  You want to be careful that people can't publish spam on the subdomain this could hurt the overall reputation.

If you want to completely stop Google crawling the subdomains you could implement HTTP basic authentication, This loads before the page is even visible.

Glad to help!

The large volume could well be to do with the way the filters are set up. There is also a possibility you could be sending some sort of authority signal somehow to Google, for instance if it is using the same Search Console as other valued brands or same WHOIS information.

My gut feeling is after the initial crawl the traffic will reduce, if it doesn't, it probably means Google is finding something new to index, may be dynamically created pages?

As far as I know, Google will attempt to find every single page it can possibly find regardless of authority.  The frequency after the initial crawl will be affected by the site authority, volume and frequency of updates.

Virtually every page on every website that is publicly accessible will be index and rank somewhere, where you rank will be determined by Google ranking factors.

Keep in mind that search console stats will be a few days out of date (2 or 3 days) and it will normally take two or three days to crawl.

I think the point that Roman is making is that it doesn't make any difference what you use for your logo from Google perspective.

You just need to make sure that it works across the different types of browser.

As far as I know, Google doesn't really interpret images as such at the moment.

As Donald said you don't want your logo as the title.

ALT text is used to describe an image, the impact on SEO is very small these days.

I would say keep the good HTML programming and editorial practices such as start your page with a header, adding titles were appropriate and elaborate with text, pictures and videos. Make sure you describe the pictures and videos with text, including the text around the element and within the ALT the text.

In this day and age, you need to optimize the user experience, not the search engine.

I would say your filters are creating pages in their own right, or at least as Google bot sees it.  I have seen a similar thing happen on a site redesign.  Potentially, if you can access each filter with a URL that could be listed as an individual page, assuming the content is different.

The first time Google crawls your site, it will try to find everything it possibly can to put it in the index, Google will eat data like no tomorrow

At this stage I wouldn't be too worried about it, just keep an eye out for duplicate content.  I guess you'll see both graphs dipped down again to normal levels within a few days.

If you already have loading speed problems having lots of videos definitely won't help.

Regarding Java I take it you mean JavaScript as opposed to Java by Oracle?  Google can the some degree at least interpret JavaScript these days but the more scripts you have on the page the more time it will take to load.

If it was me I would consider making sub- pages with one or two videos on each (or as many as necessary) that way you can have a broader coverage of keywords and the pages should load quicker.

You could look at using YouTube, it may load quicker.

All the best

I've never used compressed site maps for Google.

All they are looking for is an XML list of pages, providing Google can read it that's all that really matters.

I don't have any experience of bing i'm afraid, I just let it work.

Hope that helps

I've had an odd situation happen today.  Published a blog post and it ranked No 6 within 2 or 3 hours, just come back now (About 12 hours later) and it has completely vanished!

I have checked to page 9, and used a couple of keyword tools and it appears nowhere!

It didn't have any back links, but it was unique and high quality.  I have checked on the page does still exist and it is still readable.

Any thoughts would be gratefully received.

Also you can use data highlighter in Search Console

Providing you link to your HTML sitemap from at least some of the pages on your site search engines should find it regardless of what it's called.

Hiding content in an attempt to manipulate Google results is a violation of Webmaster guidelines and most likely will get you in trouble sooner or later.

Hidden content is a waste of time and resources.  Put the effort into some good on page content that helps people find what they want.

I guess it probably depends on the website, I think they are counted as 'backlinks' but probably carry less authority.  I guess one benefit is it helps the visibility of your pages to search engines.

I believe it's more of a user experience thing rather than SEO, although technically it is a ranking factor (very small one).  Additionally, too much bold text will probably have the opposite effect.
The purpose of bolding text is to emphasise, keep it in context and relevant and bold where you need to.

Thanks yes that confirms my suspicions.

When you say by a couple of domains I take it you mean ones that are currently active as opposed to expired?

As I understand it Google resets the domain when it expires and changes owner?

You first need to be clear if you received an actual penalty or just got on the bad side of an update and your rankings have just dropped and you are getting a less traffic than normal.

If you have an actual penalty you only have two options

1. Work with Google web spam team to try and get the penalty lifted
2. Get a new domain

If it is the latter then just getting your act together with some good quality content and and a good quality best practice SEO strategy although it may take a bit of time it should help if not resolve the problem.

If you went down the route of a new domain as Joe said you need to be aware of country specific domains don't rank as well in other countries. On the flipside in theory a country specific can help you rank within that country slightly higher than more general TLD's.

I would be careful about doing redirects, if your side has had a penalty it wouldn't be very hard for Google to work out what you have done.

I would only use incognito for a quick check, I have actually caught it personalising some results!  As Martijn it still passes a lot of signals, specifically IP address (amongst many other things).

For general reporting and benchmarking I use Moz Rank Tracker, whilst it isn't 100% it gives an good overall average.

I have had a client come and ask me to do some link building, they are wanting to use a strategy of buying expired domains and creating a single page website with some keyword links back to the main website.

Seems like an old idea at best, has anyone used it or is it risky

I'm not too sure whether it's a ranking factor or not, there are varying opinions.  I would say it's risky.

Additionally, I don't see what there is to be gained by deleting and recreating a profile that could just get another bad review, Also the person that gave you that bad review can come and leave another one!

I would work with some good customers and ask them to do reviews. Far more productive than trying to hide hide mistakes and Google will love good reviews to.

Explain to your client that resources are better spend on creating some new reviews and if you get enough good ones you can outweigh the bad ones to a large degree.  Take a look around, you will see there is plenty of excellent brands that get bad reviews from time to time.

Ok. Sounds like all you need to do is to no-follow the link in accordance with Google Webmaster guidelines see https://support.google.com/webmasters/answer/2604774?hl=en.