diff --git a/spec/asyncapi.md b/spec/asyncapi.md
index 719a33fbe..8a4c431de 100644
--- a/spec/asyncapi.md
+++ b/spec/asyncapi.md
@@ -142,6 +142,8 @@ In order to preserve the ability to round-trip between YAML and JSON formats, YA
An AsyncAPI document MAY be made up of a single document or be divided into multiple,
connected parts at the discretion of the author. In the latter case, [Reference Objects](#referenceObject) are used.
+It is important to note that everything that is defined in an AsyncAPI document MUST be used by the implemented [Application](#definitionsApplication), with the exception of the [Components Object](#componentsObject). Everything that is defined inside the Components Object represents a resource that MAY or MAY NOT be used by the implemented [Application](#definitionsApplication).
+
By convention, the AsyncAPI Specification (A2S) file is named `asyncapi.json` or `asyncapi.yaml`.
### Schema
@@ -161,7 +163,7 @@ Field Name | Type | Description
servers | [Servers Object](#serversObject) | Provides connection details of servers.
defaultContentType | [Default Content Type](#defaultContentTypeString) | Default content type to use when encoding/decoding a message's payload.
channels | [Channels Object](#channelsObject) | **Required** The available channels and messages for the API.
-components | [Components Object](#componentsObject) | An element to hold various schemas for the specification.
+components | [Components Object](#componentsObject) | An element to hold various reusable objects for the specification. Everything that is defined inside this object represents a resource that MAY or MAY NOT be used in the rest of the document and MAY or MAY NOT be used by the implemented [Application](#definitionsApplication).
tags | [Tags Object](#tagsObject) | A list of tags used by the specification with additional metadata. Each tag name in the list MUST be unique.
externalDocs | [External Documentation Object](#externalDocumentationObject) | Additional external documentation.