What is the best way to add a noindex./nofollow meta tags to tags in a blog?

[SEM_at_Lees]

Could anyone tell me the best way to add noindex./nofollow meta tags as I have around 12 duplicate tags in a blog.

I have the Yoast SEO plugin - unpaid version.

[GastonRiera]

Hi again Stephen,

Have you read the Yoast Tutorial? There is a section that details the noindex tags.
This is the article: YOAST tutorial - Noindex Tag

There is other way to do it:
Manually with the robots.txt. Here a Moz tutorial - Robots.txt
Hope it helps.
GR.