This is the 1725th most frequent Catalan word.
le
In Catalan, "le" is a clitic pronoun, the feminine singular form used in some dialects as a direct or indirect object, though its standard usage is limited and often replaced by "la" or "li."
Here, 'el' functions as a direct object pronoun related to 'el llibre'.
Li vaig donar el llibre a Marta perquè el llegís.
I gave the book to Marta so that she could read it.
In this sentence, 'el' is used as a third-person masculine singular direct object pronoun referring to a person or object.
Quan tingui més temps, el visitaré.
When I have more time, I will visit it/him.
Here, 'el' is the masculine singular definite article preceding the noun 'gos' and indicating specificity.