Welcome to the Q&A Forum

Hi there! We have not made any changes to our DA algorithm and we do update DA scores when our link index updates, which is regularly - we do not have set cadence but if link building is taking place, you should see a change in your DA score. Of course, there are other variables that go into a Domain Authority calculation and more information can be found here: https://moz.com/learn/seo/domain-authority If you have further questions, please email us at help@moz.com

If your traffic is redirecting on your new domain from the indexed old domain, that's fine. However, if you're worried about duplicate content because the old site has the same content as the new site, that can be a problem if the same page is being indexed on two different domains. You can tell Google that your domain has changed in the old search console. 1. Make sure both domains are setup in Google Search Console. 2. Set up a permanent redirect on the old site's .htaccess file, redirecting every page to the new site. 3. Search "Google change of address" in Google. The first link above should be from Google Support. Click on that and they will give you a link to the old search console. 4. In the old search console, go to the gear on the far right and click on that. You will see "change of address". 5. Be patient. It can take months before those old URLs are gone from Google.

Hi Bhaskaran, Someone with more knowledge than me may be around soon to give you a more in depth answer, but this should get you going. Google has a limited amount of resources to crawl each webpage, so to be efficient it schedules pages to be crawled based on a few different things. The one i suspect is affecting your crawl times is how often your content is updated. If google does not believe that your site will be updated frequently it sees no reason to crawl it that often. If you want google to crawl more often you need to give it a reason to do so, that means ensure your site is easily crawled by bots, good internal linking and make sure your content is fresh and up to date. On a side note, as you are carrying out a domain migration it might be easier to redirect the pages to the new page on the new domain (301 redirect) and ensure your new domain has the points i raised above. I hope this helps?