Hi to give clarification this question is asking about indirect objects and indirect object pronouns.

How does adding a + pronoun or a + noun help you understand the meaning in different sentences?

I'm not really sure because u can use both.

Sometimes using a noun more than once in a sentence makes it redundant and sometimes using pronouns more than once makes the context confusing. For example,

A Newt le gustó el perro, así que adoptó el perro y se llevó el perro a casa. (Newt liked the dog, so he adopted the dog and took the dog home.) This sentence gets redundant, so you need to add a pronoun. If you add to many, the context goes away. For example,

A Newt le gustó lo, así que lo adoptó y se lo llevó a casa. (Newt liked it, so he adopted it and took it home.) Here, we don't know what the speaker is talking about, as it is too vague without explicitly mentioning the indirect object. The best way to do it is like this,

A Newt le gustó el perro, así que lo adoptó y lo llevó a casa. (Newt liked the dog, so he adopted it and took it home.) This is a good balance of nouns and pronouns to help your reader understand what you are trying to say.

Explanation:

Hope this helps! :)