I'm asking this for a guy over at SEOchat: http://forums.seochat.com/new-user-seo-questions-answers-123/unusual-change-domain-authority-486962.html Here's what his post says: Exclamation Unusual Change in Domain authority
Guys and Girls, I'm having a weird issue in one of my sites , thing is the site had DA 11 in July and however when check on September Site is having 26 without me doing any type of link building and there are no new posts for this month as well. When checked using open site explorer there are no backlinks indexed in their Mozcape index as well. Site: http://www.beijingtravelchannel.com/ Can you give me any plausible reasons for this to happen, so that i can check them out. Thanks in Advance.

We're looking at potentially creating a robots.txt with 1450 lines in it. This will remove 100k+ pages from the crawl that are all old pages (I know, the ideal would be to delete/noindex but not viable unfortunately) Now the issue i'm thinking is that a large robots.txt will either stop the robots.txt from being followed or will slow our crawl rate down. Does anybody have any experience with a robots.txt of that size?

Hello, I've never had to deal with an international site before, let alone a site merge. These are two large sites, we've got a few smaller old sites that are currently redirecting to the main site (UK). We are looking at moving all the sites to the .com domain. We are also currently not using SSL (on the main pages, we are on the checkout). We also have a m.domain.com site. Are there any good guides on what needs to be done? My current strategy would be: Convert site to SSL. Mobile site and desktop site must be on the same domain. Start link building to the .com domain now (weaker link profile currently) What's the best way of handling the domains and languages? We're currently using a .tv site for the UK and .com for the US. I was thinking, and please correct me if i'm wrong, that we move the US site from domain.com to domain.com/us/ and the domain.tv to domain.com/en/ Would I then reference these by the following: What would we then do with the canonicals? Would they just reference their "local" version? Any advice or articles to read would really be appreciated.

We're looking at expanding our robots.txt, we currently don't have the ability to noindex/nofollow. We're thinking about adding the following: Checkout Basket Then possibly: Price Theme Sortby other misc filters. What do you include?