You suggested to fix "it appears that your tags and categories do not have descriptions written for each." I did that 4 days ago - and errors have only crept up :)
"In the absence of a specific description, the site's tagline is being used, which would be a duplicate."
How do I add a specific description?
"Your date-based archives will continue to use the tagline as the meta description; however, as it's better for both you and the user for folks to land on specific posts (instead of a date-based archive), it's not an issue."
I didn't understand what you just said :)
Thank you in advance for helping me solve this issue.
Below is the report from google webmaster tools today:
HTML Improvements Last updated Oct 21, 2013
Addressing the following may help your site's user experience and performance.
Meta description Pages
Duplicate meta descriptions 213
Long meta descriptions 0
Short meta descriptions 122
Title tag Pages
Missing title tags 0
Duplicate title tags 101