Questions & Answers about “Y” es una conjunción muy común y aparece en muchas frases.
Because the sentence is talking about the word y itself, not using it normally inside the sentence.
When a language talks about a word as a word, Spanish often marks it with quotation marks, italics, or similar formatting. So Y here means “the word y.”
That is why the sentence says:
- Y es una conjunción...
- “Y is a conjunction...”
So grammatically, the word is being treated as a single item you can describe.