A conglomerate team is basically an adult age team. The National Office recognizes teams that start at 40+ and on up in increments of five years. What does that mean? If you will turn 40 sometime during 2023, you are eligible to play on a 40+ team, as are all players older than that. But, if you are 40, you are not eligible to play on a 45+, 50+, and so on.
Why play on a conglomerate team? Some players only do so at Nationals. Others want to play more often so will be on a regular divisional team and an age team. You can also play on two conglomerate teams if you qualify for both age groups. If you do that, you cannot play on a divisional team, as a player can be on no more than two teams. CHRVA recognizes what the National Office does, and also includes 30+ and 35+. Age teams can play in any tournament, but generally chooses a division.