Samsung Galaxy S9 Manual page 5

Say hello to Bixby!
Hello Bixby lets you set reminders and create
voice dictations. Plus, quickly search for content
on your phone and across the Internet.
To launch Hello Bixby, simply press the
Bixby button.
NOTE: For more information about Bixby, visit
samsung.com/us/support/owners/app/Bixby