Articles are not used with plural or uncountable nouns when referring to them in a general sense, e.g., "Cats are cute" (no article) or "I love music" (no article).
"The" is used when referring to a specific member of a group, e.g., "I saw the cat that was chasing a mouse."
"The" is used with superlative adjectives to compare items within a specific group, e.g., "She is the tallest girl in the class."
"The" is used before unique objects or concepts, e.g., "the Internet," "the universe."
It's important to note that there are exceptions and additional rules to consider. However, these guidelines provide a general understanding of the correct use of articles in English grammar.