Disallowing /wp-admin/ on robots.txt

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Stephen Watson: Hi Everyone, ;
  Looking for some guidance. I added about 14 pages of unique content and did all of the on page SEO work using Yoast - have 'good' status on all of them some of the website architecture was changed - mainly on one page.
  
  That being said, we got a significant bump the day I implemented, however every day thereafter we have had very bad results. Worse than we had before.
  
  I did resubmit the updated sitemap to GWT and I'm showing no crawl errors.
  
  Also, curious if my Robots.txt file could be the issue. All it contains is User-agent: *
  Disallow: /wp-admin/
  
  Any insight or advise is greatly appreciated!
  Thanks for your time  ;
• 
  Ben Carew: Hey there. Your robots.txt should be fine like this. You could probably let Google index a whole Wordpress site these days as they can now understand the JavaScript pretty well.
  If I were you I would take a look at your link profile in opensiteexplorer or SEM rush to try and understand the relative power of your site. Maybe you have taken a rankings hit lately that you don't know about. GA data could give you a good picture too.
  Anyone else?
• 
  Shawn Payne: yeah use open site explorer or another tool to study who is ahead of you. Work on getting more links. And post daily to all social media sites