If you have specials or events on, create a dedicated space on your channels to keep updated with relevant information.
Let people know that you have a promotion or special menu on. You should be making sure to include who it is for, what they should be expecting to pay, any dietary restrictions, where the venue is, accessibility, etc.
The more you can put out, the better informed your audience will be – and the more likely they will remember your establishment and feel excited to dine with you.