Google Announced on June 5 that it was adding more post type to Google My Business.
Here is the list directly from Google.
Google My Business Post types
Each post type provides your audience with specific details and allows you to add a call to action (CTA) button to your post.
What's new posts: Posts that provide general information about your business. You can include a photo/video, link, CTA button, and other information. For example, a restaurant could make a post to promote a new menu item.
Event posts: Posts that promote an event your business is involved with or supports. Event posts require a title, start/end dates and time, and may include a photo/video, CTA button, and other information. For example, a bookstore may advertise a local author's book signing or a book club meeting.
Offer posts: Posts that provide promotional sales or offers from your business. Offer posts require a title and start/end dates and times. A “View offer” CTA button is automatically added to the post. You can also include a photo/video, coupon code, link, and terms and conditions with the post. For example, a pizza parlor may advertise a 20% off large pizzas for a week.
Product posts: Posts that emphasize a specific product your business sells. Product posts require a title and photo or video. You can also include a CTA button and other information. For example, an electronics store may promote a new phone for sale.