Edit all duplicate Meta tags (Title, description)
You can edit your duplicate meta tags, website has many pages but we consider only those pages which have only seo benefits rest of pages like testimonial, content can be have duplicate meta tags or short description so you can edit this using webmaster help.
Go to your webmaster tool than Search Appearance than HTML Improvements and check which pages Meta tags have duplicity.
Duplicity Check
Check your all pages content duplicity using copy scape tool. If any duplicate page found than rewrite 100% unique page immediately.
Thin Content Improve
If you want to safe panda algorithm than improve your content, 500 words for home page and 300 words for inner page minimum.
Canonical Issues
If your website is not canonically solved than panda can hit your website. so solve all duplicate url canonical issues.
Blog Duplicity
Archives, tags, categories, comments are consider duplicate.
How you can handle duplicate Blog (Wordpress)
Wordpress is an open source platform so most of the website owners use wordpress blog in website. The best option is a remove all archive, comments, tags, categories.
Step1. Install Yoast Plugin if possible, it is a free SEO tool for wordpress.
Step2. Go to in Appearance than widgets and remove archive, date based archive, category, tags.
Step3. Use Yoast blog to handle all duplicate blog problems. Check links
Fix all these problems.
If you want remove all tags and category from old posts than go to editor than content single-post.php and content.php and edit code if this is not possible than go all post and delete all category and tags from one by one post. Otherwise use noindex.
What can you do using Yoast
Set your URL static
Set Meta Tags for all posts
Set Alt tag for images and remove image url
Set www or non www issues
Set ReplyToVom issue
Set breadcrumbs or navigation (Bamboo>Maintenance)
Set XML Sitemap any time
Remove/nofollow date based, category based, tag based url.
Google Authorship
Create a Gmail account with full details and photo
Put Google Plus link in footer or in meta tag according to images. Use domain based mail id for Google authorship verification.
Or
Edit all duplicate Meta tags, Full content, solve canonical, optimize your blog using Yoast, Join Google Authorship. Best Off Luck.
