With iOS 15 and iPadOS 15, you can pin articles and images you wish to save that have been sent over Messages. Here’s how:
° Launch Messages.
° Go to the thread and message you want to pin.
° Tap and hold on the link or image you want to pin.
° Tap Pin.
A yellow pin icon will be attached to the article, link, or image you want to pin.
To view your pinned items:
° In the iMessage thread you want to see the pins of, tap the profile photo and name.
° Scroll to the Pins section.
° Tap See All.