You can archive chats in the Signal messaging app to hide them from view if you don't need them clogging up your inbox anymore. To archive a chat on an iPhone, swipe it to the left and choose "Archive ...

This guide explains how to archive conversations in Google Messages on your Android device. Open the Google Messages app and access the list of conversations. Select the conversation you want to ...

Archiving an email on Gmail removes it from your main inbox. Archived messages can still be accessed via search or the "All mail" folder. You can also unarchive emails if you want to put them back ...