This chapter provides you with enough information to start running simple queries effectively in production. That said, search and the query DSL are big subjects and the more time you invest in understanding how they work, the better your search results will be. We will dive much deeper into these areas in [search-in-depth] but before we get there, we need to understand why Elasticsearch returns results in the order that it does. In the next chapter we will look at how results are sorted by relevance and how you can control the sorting process.