How does iphone send text messages in groups?

This video was recorded by iPhone 1 1 brand and iOS 14 system. Equipment model: ipone 1 1 system version: iOS 14 1. First, open the text message. 2. Click the icon in the upper right corner to edit the message. 3. Click the "+"sign in the upper right corner to add a contact. 4. Select the contact person who needs to send a group message. 5. Edit the message, click Send, and summarize the message in groups. First, open the text message. 2. Click the icon in the upper right corner to edit the message. 3. Click the+sign in the upper right corner to add a contact. 4. Select the contact person who needs to send the group message. 5. Edit the message, and then click Send to send it in groups.