Should I let Google index tags?

[DiamondJewelryEmpire]

Should I let Google index tags? Positive? Negative

Right now Google index every page, including tags... looks like I am risking to get duplicate content errors? If thats true should I just block /tag in robots.txt

Also is it better to have as many pages indexed by google or it's should be as lees as possible and specific to the content as much as possible.

Cheers

[DiamondJewelryEmpire]

your are absolutely right and it's exactly what I thought. The only thing is better to do is instead of un-indexing them I'd rather set up canonical links for the tag pages if it's possible.

[AdoptionHelp]

I assume you're talking about a wordpress site?

Tag, author, and archive pages represent a possibility for duplicate content, and so most people recommend noindexing them. You can do that with the popular SEO plugins, like All-in-one SEO.

Generally you want more pages indexed, but only if they're quality and not duplicating existing content. Each additional indexed page represents another chance for people to find your site.