Samsung J320 - Delete Gmail Threads

Messaging and Internet 123
 The inbox opens.
Touch and hold a conversation thread (or touch the thread's icon/picture) to add a checkmark to 2.
it, and then tap More options > Mute.
 The thread is now hidden.
Delete Gmail Threads
If you no longer wish to keep a Gmail conversation thread (or touch the thread's icon/picture), you can
simply delete it from the inbox.
From home, tap Apps > Google > Gmail . 1.
 The inbox opens.