Keep announcements short sweet and simple.
Newsletters have gone or have nearly gone from Churches. To replace this, emails, announcement slides/videos and on Social Media Platforms. Video announcements seem to be more of a thing of getting the message across or a reason to leave the service and go to the toilet.
SMS & App Notification systems are the common thing of letting the Church congregation know of what’s happening. Do make sure you have signed permission forms (hard copy or electronic) or other evidence of a person giving you permission to contact them via these methods.