ございます・
ございます is a very polite form of あります for the existence or availability of things. でございます is a highly polite ending after a noun or na-adjective stem, corresponding to ordinary polite です.
Two different jobs
The presence or absence of で matters. Use ございます to say that a thing exists or is available. Use でございます after a noun or na-adjective stem to identify or describe something very politely.
Core uses
Ordinary polite versus highly formal
Both sentences state the same fact. The version with です is ordinary polite Japanese; the version with でございます raises the level of formality and suits staff announcements or formal service.
More examples
ただいま空席がございます。
Seats are currently available.
Analyze会議室は三階にございます。
The meeting room is on the third floor.
Analyze各種サイズがございます。
Various sizes are available.
Analyze担当の森でございます。
This is Mori, the person in charge.
Analyze店内は大変静かでございます。
The interior is very quiet.
Analyzeお手洗いは廊下の奥でございます。
The restroom is at the end of the corridor.
Analyzeおはようございます。
Good morning.
Analyze