Christina, announcements is for just about anything. You can use it to make announcements about new listings, coupons, sales you may be running, etc. Or just use it to introduce yourself and your shop. Give a quick idea of what you make and why. Say something to intrigue the buyer to enter your shop. Let people know that what you have is unique, rare, unusual, or something like that. Change it up every so often so it doesn't get stale. Use it to excite, intrigue, interest, notify, etc.