We use determiners to express the reference of a noun in a given context. They tell us if the noun is general or specific.
The definite article: The.
Possessives: My, your, his, her, its, their, our.
Demonstratives: This, that, these, those.
We use specific determiners when we believe the listener/reader knows exactly what we are talking about.
Do you want the ketchup?
Look at those lovely dogs.
Thanks for your present.
This is my computer.
People don’t like this candidate.
General determiners are: A, an, any, another, other, what
_We use general determiners when the listener doesn’t know what we are talking about. We can use an uncountable noun or a plural noun with no.
I like any dog I see.
I need another computer.
Education is the most relevant aspect for a society.
Water is good for you.