In Spanish, when to use the definite article and when to use the indefinite article.

1. refers to someone or something;

2. refers to people and things that know each other.

3. refers to the person or thing mentioned above,

4. Used to refer to something unique in the world, such as Latila.

5. Used before some special nouns, such as La Gran Muralla.

indefinite article

The word 1. indicates a certain kind of person or thing.

2. Refers to someone or something without specifying what it is, who and what.

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4. Used in some fixed phrases.

-Dahua Spain team