From time to time I receive a private message from someone asking me for help.
I was answering their questions, but recently I don't!
And I send them a message like this:
I advise you to post your question in the <space name> of the <community name>.
This is more useful for you as your question will be seen by many experts out there, so you may get several answers and find that one of them is the best and more convenient for you.
You can ask me here, I may give you the answer or I cannot, and if I give you an answer, there may be someone else who has a better answer than my answer, so I encourage you to post the question in the community.
Another reason for that The answer may require to provide you with an attachment file, and this is not available on private messages.
Absolutely, we much prefer to keep these conversations public so they can help as many users as possible. It shouldn't feel like your participation is just offering one-on-one advice or individualized tech support.