It serves as a rhythmic filler or "quejío" (cry) that allows singers to express emotion through sound alone.
The song has been covered by numerous artists, including Rosanna Rocci (German version) and modern guitarists like Elena Yerevan . Musical Meaning LailolГЎ
It is similar to other flamenco sounds like "Ay," "Lere," or "Lo-lo-lo," often used to build energy during a performance. It serves as a rhythmic filler or "quejío"