My client got adsense policy violation for 404 pages since the static adsense code appeared in the widget of sidebar. Therefore, we run few lines of code to disable the adsense in 404 pages.
- add free "code snippets" plugin
- add the code in this link https://gist.github.com/girvan/b779d6b5f969f804f283aab435ad94bb
- turn on the code
