Tato služba tady neexistuje.

This service does not exist here.

Breakdown of Tato služba tady neexistuje.

• tento: this
• tady: here
• služba: the service (offering)
• existovat: to exist

Questions & Answers about Tato služba tady neexistuje.

Why is it tato služba and not tato službu or tento služba?

Because služba is a feminine noun and here it is the subject of the sentence, so it must be in the nominative singular.

• služba = a service
• nominative singular of služba = služba
• the feminine singular nominative form of this is tato

So:

• tato služba = this service

Compare:

• tento = masculine singular nominative
• tato = feminine singular nominative
• toto = neuter singular nominative

And službu would be accusative singular, which would be used if service were the direct object, not the subject.

What exactly is tato? Is it the same as this?

Yes. Tato is the feminine singular nominative form of the demonstrative pronoun/determiner meaning this.

In Czech, this changes form depending on the gender and case of the noun:

• tento dům = this house
• tato služba = this service
• toto město = this city

So tato is not a standalone random word—it agrees with služba in gender, number, and case.