Hi towneyk,
Are you referring to pinning an important conversation in the Messages app? If so, for help with pinning a conversation test the steps below found in the article here: Use Messages on your iPhone or iPad
"
Pin important conversations
- In Messages, tap Edit or the More button
. - Tap Edit Pins
, then tap the Pin button
. - Tap Done.
You can also touch and hold a conversation to pin it. In iOS 14 and iPadOS 14 and later, you can pin up to nine conversations."
However, if you're referring to adding a VIP contact to your Favorites list for quick dialing, the steps below found here will assist. Use Contacts from the Phone app on iPhone
"Add a Favorite
You can add VIP contacts to your Favorites list for quick dialing.
Select a contact, scroll down, then tap Add to Favorites."
The guide page here also has some helpful information. Send and receive messages on iPhone
If there's a different feature you're looking to use, provide some additional information and we'll continue to assist.
Cheers.