Questions & Answers about zhège gēdān lǐ yǒu hěnduō gē.
Because 这 / 那 normally need a measure word before a noun in Chinese.
So:
- 这 + 个 + 歌单 = this playlist
- 那 + 个 + 歌单 = that playlist
Here, 个 is the measure word being used with 歌单. It is the most common general-purpose measure word, and learners will see it very often.
里 is a location word / localizer meaning inside or in.
So:
- 歌单里 = in the playlist
- literally, inside the playlist
In this sentence, 这个歌单里 sets the location or context for what follows.