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The scenario states:

Five candidates for mayor - QRSTU- will each speak exactly once at each of three town meetings - meetings 1 2 and 3. At each meeting, each candidate will speak in one of five consecutive time slots. No two candidates will speak in the same time slot as each other at any meeting. The order in which the candidates will speak will meet the following conditions:

I do not understand "no two candidates will speak in the same time slot as each other in any meeting" . I feel like it was never addressed in the Powerscore answer explanation. I just want to gain some understanding in case something similar reappears in a future LSAT. I answered each question in this game with uncertainty since I wasn't sure how this statement applied

It means each meeting has 5 slots that have one and only one speaker, e.g. the third slot in meeting 2 has only 1 candidate in it. You can't have Q and R speak at the same time and then have one of candidate speak twice in one meeting.