conjunction
if it is the case; if so
Polite conditional form of です, equivalent to だったら in casual speech. Used to present a hypothetical or conditional statement politely.
See also: だったら
明日でしたら、時間があります。
If it's tomorrow, I have time.
お急ぎでしたら、こちらをどうぞ。
If you are in a hurry, please take this one.