You may wish to send bulk email to your subscribers, for this purpose you can use phpList software, available in Softaculous Apps Installer.
1. Log in to your cPanel account and scroll down to
Softaculous Apps Installer section.

2. In Categories select
Mails.

3. Find
phpList Script ant press
Install.

4. In Software Setup GUI select directory where to install phpList, choose
Admin Username and
Admin Password, which will be used to log in.

5. Press
Install and wait until installation is complete.
Once done, you can log into admin console through earlier selected address, like
https://yourdomain.tld/phplist/admin/ and send emails.