A pronoun is a word that is used to replace a noun or a noun phrase in a sentence. Pronouns are used to avoid repetition and to make writing or speaking more concise. Pronouns can take the place of a person, animal, object, or concept.
Determiners are words or phrases that come before a noun to provide additional information or context. They help specify the reference of the noun and can indicate things like quantity, definiteness, possession, or demonstrative reference