Use the language from the invitation
If a post asks people to comment GUIDE, configure GUIDE as the matching term. Avoid building a long list of guesses before you have seen real responses. A simple rule makes it easier to know why a conversation began.
RelayDM supports keyword matching for eligible comments, incoming text DMs and Story text replies. These are distinct trigger types, so verify the correct source and connected account in the builder.
Check near misses and exclusions
Test the exact phrase, a natural sentence containing it, and an unrelated response. Add exclusions where necessary. The aim is not to catch every possible message; it is to avoid opening the wrong journey for someone who asked for something else.
Review the whole conversation
A good keyword is only the entrance. Read the opening DM, any continuation instruction, and the final delivery together. Confirm that each step answers the request the person actually made.