Pointing out a specific noun
Demonstrative determiners single out specific people, objects, qualities, concepts etc. The most important determiner is dieser ‘this’/‘that’ which refers to a noun in close proximity or previously mentioned:
Dieser Bus fährt in die Stadt.
This/that bus goes into town.
Kennst du diese Leute?
Do you know these people?
Another frequently used demonstrative is solcher ‘such’:
Solchen Unsinn habe ich schon lange nicht mehr gehört.
I haven’t heard such nonsense in a long time.
Demonstratives follow a very similar declension pattern as the definite article. Here are all the forms of dieser: