what's more

what's more

Furthermore; the next aspect or fact is equally or more important. Based on our testing, this blender performed the best. What's more, it is half the price than most of the other models!
See also: more
Farlex Dictionary of Idioms.

what is more

Also, what's more. In addition, furthermore, as in I never got there; what's more, I never really intended to go. [First half of 1800s]
See also: more, what
The American Heritage® Dictionary of Idioms by Christine Ammer.

(and) what’s ˈmore

,

what is ˈmore

(and) more importantly; (and) in addition: I don’t like pubs. They’re noisy, smelly, and what’s more, expensive.
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Farlex Partner Idioms Dictionary
See also:
  • what is more
  • down to (someone or something)
  • down to somebody/something
  • gronk out
  • best-kept secret
  • consist
  • consist in (something)
  • get to the heart of
  • get to the heart of (something)
  • break it down