VIPs

• Big Spender: Buy out all of a random item in a shop.
• Delivery: Fully stock all items on one floor.
• Celebrity: Change the dream job of any bit not currently working in a dream job to the current store.
• Construction: Take 3 hrs off construction of any floor.
• Real Estate: Move new bits into any open apartments on one floor.

New in 4.9.0 - Exclusive VIPs purchased through the Gold Pass in the Buy More menu:

• Tutor: Increases each bitizen’s skill level by 1 on chosen floor
• Hacker: Upgrades floor by 1 level

The best store for Delivery VIPs is Cake Studio, assuming it is at the same (or higher) Level as all your other stores.

If your Cake Studio is at Level 10 or has a Gold Ticket on it, has 3 Dream Job workers, and already has some 2-coin and 3-coin items in stock, you can receive a Fully Stock Bonus of up to 50'802 base coins when you send a Delivery VIP there.
For this reason, many players will use one of their first two Gold Tickets (or bux upgrades) on Cake Studio.

The more stock a store already has when you send a Delivery VIP there, the more coins you’ll get.

The best store for Big Spender VIPs is Soda Brewery, assuming it is at the same (or higher) Level as all your other stores.

Stock only the 3-coin item.
If your Soda Brewery is at Level 10 or has a Gold Ticket on it and has 3 Dream Job workers, you will receive up to 255'312 base coins when you send a Big Spender VIP there.
For this reason, many players will use their first Gold Ticket (or bux upgrades) on Soda Brewery.