“Là” is an adverb. It’s used for time and place.

• Ce moment-là : this precise moment, the “là” puts the word “moment” in kind of highlights
• Ce niveau-là : same idea, to put attention about “niveau”.

But be carefull with the article “la” without accent

EDIT: I would like to add that “-là” is used to show that there is a distance compared to use “-ci”.
For exemple, “ces jours-ci” means they are closer than “ces jours-là”. You can find a better explanation here: « voici » versus « voilà »