New Data Voter Article (continuation)

Hiya guys!

This is just a continuation of #3138 by @monbro. I needed to rebase it against the 2.3 branch (which had conflicts), and wanted to proofread it (hence the fresh PR).

Please check out my latest commit to see if I've made any mistakes :).

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | yes 
| Applies to    | 2.3
| Fixed tickets | #2877 

Thanks!