Articles, according to Grammarly, are the words that define a noun as specific or unspecific. In English, the definite article is the, and the indefinite articles are a/an/some. We use these words everyday, but we sometimes don’t know their function in a sentence.
In Spanish the articles are a bit different. There is both a singular and plural form as well as a masculine and feminine form.
This video gives more information and some practice exercises: