It's good for minimizing search indexes and query response. The size gets smaller when you don't index all those words that exists in all documents and mean not

It's good for minimizing search indexes and query response. The size gets smaller when you don't index all those words that exists in all documents and mean nothing. And query/result response gets shorter when it doesn't have to calculate relevancy between a too large result set. I also see a lot of people use it for chat bots and machine learning.