Hi there - Kristina from Moz's Help Team here

Thanks for writing in and sorry to hear about the troubles with your MozBar. We've been seeing reports from other customers with the tool, as well, and have updated our Health Page to reflect the known issues we're seeing with the tool at this time.

There's a couple of steps we've seen work for others that might help you with your issue at this time. Can you please attempt these steps on your side and let us know if you're still seeing issues?

1. Un-install your MozBar plugin. I've taken a quick video here for you on how to find the tool in your extension list in Chrome.
2. Un-install and re-install Chrome.
3. Turn off any additional plugins that could be interfering with MozBar
4. Clear all cache and cookie data related to moz.com
5. Re-install your MozBar plugin here.
6. Sign into your Moz account here and the MozBar.

Clearing your cache and cookies of all Moz related data is a very important step since we've recently required authentication for the toolbar to function properly. If you are still having issues after that it means the problem is coming from our side and we'll have to wait for an update from our MozBar team.

Sending over the below information to help@moz.com that we can provide to our developers would be a huge help in their efforts on diagnosing the issue, so if the above steps don't work for you, can you please perform the following steps and send over this screenshot to us?

1. Click on this icon in the upper right corner of Chrome -  http://www.screencast.com/t/HUj3m4DGuoqK
2. Move the cursor over 'More Tools' and then click on 'Developer Tools' -http://www.screencast.com/t/B7SIh7qiPj
3. Click into the 'Console' tab - http://www.screencast.com/t/itHrYuuq
4. Make sure MozBar is running and then refresh the page if needed.
5. Take a screenshot of the results (the entire window is recommended) and send that to us.
6. What version of MozBar are you running?
7. What is your OS version?

Thank you so much for your help, and for your patience while we work to resolve these issues. I look forward to hearing back from you about the above.

-Kristina

Hi there! Kristina from Moz's Help Team here.

Sorry to hear about your DA dropping. The reasoning behind this can be hard to pinpoint without the help of an SEO consultant or the specific web designer for your website. Domain and Page Authority scores are both calculated using Moz's Ranking Models. In essence, we take a lot of rankings data from the search engines (by running queries) and then try to build a predictive scoring system using our own on-page analyses and Mozscape link data to construct an algorithm that will effectively reproduce the search engines' results. Our current accuracy hovers in the 70% range, but over time, we expect to improve.

Once we have a ranking model (which we internally call "uber"), we can create scores that best approximate the combinations of all our page-specific link metrics or domain-specific link metrics (removing the keyword-specific features like anchor text, on-page keyword usage, etc). These scores represent the model's query-independent or non-keyword-based ranking inputs.

In simple terms, Domain Authority is our best prediction about how content would perform in search engine rankings on one site vs. another. Page Authority answers the same question for an individual page. Both are amalgamations of all the link metrics (number of links, linking root domains, mozRank, mozTrust, etc.) we have into a single, predictive score.

It's important to note that both Domain Authority and Page Authority are on a 100-point, logarithmic scale. Thus, it's much more difficult to grow your score from 70 to 80 than it would be to grow from 20 to 30.

It is also important to note that if the higher authority sites that your site is seeded from drop in score, it will ripple down to all of the other links branched off from the very top. A good place to start is to compare the DA from the linking root domains from the previous index. Also take a look at your competitors scores to see how much they have dropped as well. As our indexes grow in size, there are more links that are included in our calculations.

We recommend keeping track of how many linking root domains you have from index to index, as this will be a quick way to confirm possible reasons for an increase/decrease in the score. For an in-depth discussion from Rand, check out this article: https://moz.com/community/q/da-pa-fluctuations-how-to-interpret-apply-understand-these-ml-based-scores

Here's some places to really delve into what is going on: 
http://moz.com/blog/whiteboard-friday-domain-trust-authority 
http://moz.com/blog/googles-algorithm-pretty-charts-math-stuff 
http://moz.com/blog/whiteboard-friday-domain-authority-page-authority-metrics

Here are some good resources to help you take a look at the factors.
http://moz.com/blog/whiteboard-friday-domain-authority-page-authority-metrics
http://apiwiki.seomoz.org/w/page/20902104/Domain%20Authority
http://moz.com/blog/whiteboard-friday-domain-trust-authority

I hope this helps! Sorry I can't go into any more detail, but hopefully these links can help you get a handle on it. Best of luck!

Hi there - Kristina from Moz's Help Team here.

I'm not sure if I'm understanding your full question, so please let me know if I'm missing anything.

Our Open Site Explorer tool (https://moz.com/researchtools/ose/) is designed provide you a view of the link data for a particular page, a specific subdomain, or for the entire root domain of a site.

Here's a link to our Help Hub guide on the tool: https://moz.com/help/guides/research-tools/open-site-explorer for additional information.

As always, if you have specific questions about our tools you can always reach out to my team by sending us a note with the details of your question to help@moz.com, but hopefully this helps!

Thank you,
-Kristina

Hi Jake! Kristina from Moz's Help Team here.

It looks like you have a few campaigns, so it is difficult for me to look into what may be the issue here without a bit more detail. If you don't want to share which campaign you are referring to here, can you please email us at help@moz.com or click the blue message icon in the bottom right corner of your campaigns to send us the details of which campaign you had this issue on so that we can investigate further?

I look forward to hearing from you soon.

Thank you,
-Kristina

Hi there! Kristina from Moz's Help Team here.

Hi there! I'm sorry your site isn't showing up in Open Site Explorer yet. I'll try to explain a few reasons why this might be happening:

There are two types of link data we capture: external and internal linking pages. In order for us to discover backlinks to your site, we need to crawl the sites and pages linking to you. Once we can find those links, we will then be able to crawl your site to find pages you link to and so forth.

If you don't see any inbound links from external sites, there are a few things to check real quick:

• Check your URL for typos or other errors. Did your URL cut off or contain the wrong punctuation?
• Check out the site's navigation. Sometimes it takes multiple index updates for us to discover pages that aren't linked to from the site's primary navigation. One simple fix is to create a link to the URL from another page on the website.
• The Mozscape index is still growing! Keep in mind that, while large, our index doesn’t cover the entire web. If you have a smaller site, it’s possible we haven’t crawled the domains linking to it. Search the pages linking to yours to see if we have indexed their links. If you need help with link building, we've got a fabulous guide here: https://moz.com/beginners-guide-to-link-building.

If you don't see any internal links to your page:
Make sure we're not blocked from crawling this URL or site. If our web crawlers are blocked from crawling certain pages (i.e., with "noindex" or Robots.txt), they may not be included in the index.

For some more in-depth info, here's how we compile our index:

• We grab the most recent index.
• We take the top 10 billion URLs with the highest MozRank (with a fixed limit on some of the larger domains).
• We start crawling from the top down until we've crawled 90,000,000,000 pages (which is about 35% the amount in Google's index).

So, if the site is not linked to by one of these seed URLs (or one of the URLs linked to by them in the next update) then it won't show up in our index.

Other tools, such as Webmaster Tools, Ahrefs, and Majestic will alway show more link data as they target the quantity of links, while OSE focuses more on quality and Domain Authority. It’s best to use all the tools you can to obtain a full backlink profile; I've got a post here that details why and how that is: http://www.seobook.com/comparing-backlink-data-providers

Mozscape focuses on a breadth-first approach. Therefore we almost always have content from the homepage of websites, externally linked-to pages, and pages higher up in a site's information hierarchy. However, deep pages that are buried beneath many layers of navigation are sometimes missed and it may be several index updates before we catch all of these.

We update once a month and you can view the next scheduled update here: http://moz.com/products/api/updates

Hope this helps provide some clarity. Please let me know if you have any questions!

The good news is that a recent update has been made, and we're ready to accept beta SNI customers to test it out. Please see the article here that explains this further: https://moz.com/community/q/moz-pro-our-web-crawler-and-sites-that-use-sni and if you're interested in being a part of the beta testing, the link to the sign up page is here: http://goo.gl/forms/LCvL9Ix8JDHfbAvr1