Oh absolutely! Start by inviting AttendanceBot to a channel by /invite @attendancebot in that channel.
To enable announcements for all punches, head to your settings panel by typing 'settings'. Under Time tracking and announcements, enable the necessary announcements and timings as required.
You can also announce punch card on the channel at a specific time of the day.
Note: Enabling this would make the channel very noisy. Use with caution. You can always come back and disable this.