The Matrix protocol allows you to integrate (connect) popular services using bridges: Telegram bridge, Whatsapp bridge, Signal bridge, Discord bridge, email bridge and others (the full list of bridges is
here).
Such a bridge makes it possible to connect a regular messenger account to your Matrix account, after which all content from the original messenger will be duplicated in Matrix.
This design not only greatly simplifies everyday communication (all messengers in one app), but also provides an additional layer of anonymity (the original messenger does not see beyond the Matrix server) and encryption (client-server).