Is it better to not allow Google to index my Tumblr Blog?

[wickerparadise]

Currently using a subdomain for my blog via Tumblr

In my seo reports I see alot of errors. Mostly from the Tumblr blog. Made change so there are unique titles and tags. Too many errors I am wondering if it is best to just not allow it to be indexed via tumblr control panel.

It certainly is doing a great job with engagement and social network follows, but i'm starting to wonder if and how much it is penalizing my domain..

Appreciate your input..

By the way this theme is not flash for the content very basic single a theme...

[NakulGoyal]

If it's on a sub-domain, it's not affecting your main domain. If it's part of your marketing mix, I'd still continue to use it and see if it makes sense. If not, at some point you could possibly get rid of the custom domain setting and still let it sit there. Is it unique content that you have there ? If there isn't enough engagement, is it the kind of content you are publishing ?