Indexed, though blocked by robots.txt: Need to bother?

[vtmoz]

Hi,

We have intentionally blocked some of the website files which were indexed for years. Now we receive a message "Indexed, though blocked by robots.txt" in GSC. We can ignore as per my knowledge? Are any actions required about this? We thought of blocking them with meta tags but these are PDF files.

Thanks

[GastonRiera]

Hi there!

What Google is telling you is that you are indexing URLs that you probably are  not wanting to be indexed, or the other way around, that important pages are being blocked but indexed for other reasons.

If I might ask, why did you blocked through robots.txt those files?
There most 2 answers are:
1- Wanted to remove those from search results. If this is your case, you've solved only a part of the problem. What you should have done is (previously allowing robots to crawl those urls) apply noindex rules (keep in mind that can be set up in the HTTP header, as long as not html files cant have meta robots tag), then after a sufficient time block them in robots.txt. 
_2- Optimize how GoogleBot (crawiling) time. _Being this case, then you've done it correctly and there is nothing to worry.

Hope this help.
Best luck.
GR