No, itʻs a command. In the tips it explains you use E before names and commands (telling someone to do something):
E is used before an action to signify a command or a suggestion. When you say, "E hele!", you're telling someone to "Go!"
E is used before a noun (usually a person) to indicate that the person is being addressed.
A lot of statements in isolation can seem odd, but make sense with the right context. I imagine they just want us to practice these words, but if it helps:
You spent a lot of time preparing an ornate meal, then dished it out to your guests/family/whomever. They say something like, "Wow, this looks amazing, and smells delicious!" but you are eager for them to taste it, too! So you thank them for the compliment, then tell them to eat.
"Mahalo! E ʻai!"