On our site, we have about 20% original content and 80% duplicate content that are outdated press releases we published for different companies provided to us by PR firms.
There are 2000+ of them, and they don't rank. We have heard Brian mentioned the term "zombie pages" in below tutorial ( from 2:20 ). And they seem to fit into this area.
We are planning to delete 99% of them and only keep recent news. We plan to delete them alll and redirect them all with 301 permanent redirect using Yoast plugin.
Can anyone help by letting us know if this is this the logical step to take?