No-one knows everything. Do not feel that just because you cannot help someone, or that while helping you have run out of ideas that you are wasting your time or should do better. The more you read in the forums and the more help you give the better you will become.

If you’re unsure of an answer, you can always search the codex and the forums yourself.

For more specific results, these are some very handy Google queries:

site:codex.wordpress.orgWordPress.org The community site where WordPress code is created and shared by the users. This is where you can download the source code for WordPress core, plugins and themes as well as the central location for community conversations and organization. https://wordpress.org/ search terms

site:wordpress.org/support/ search terms

If you try to help, but you reach a point where you run out of ideas, don’t be afraid to let the user know you’re stepping aside, and follow the thread to find out what the final answer is.