There is a tutorial: https://community.nodebb.org/post/47600
Banner advertising space?
Is there any possible way to edit nodebb source code? I just want to add banner space between top navigation and post area.( Please see black color line) It should be visible on all pages except home page. Anyone?
@PriñCe-Jąy use widgets. You can not adjust the display on certain pages =(
The other option would be to modify the theme you are using to add in the ad code.