title: Boosting in Elasticsearch
body: <p>I am new to elasticsearch. In elasticsearch we can use the term boost in almost all queries. I understand it's used for modify score of documents. But i can't find actual use of it. My query is if i use boost values in some queries, will it affect final score of search or the boost rank of docs in index itself.</p>
  <p>And what is main difference between boost at index and boost at querying..</p>
  <p>Thanks in Advance..!</p>