fix(http): Accept-Encoding can appear in both requests and responses

.vscode/dictionaries/terms-abbreviations.txt

@@ -83,6 +83,7 @@ BMFF
 bootup
 botmaster
 BPTC
+Brotli
 browserless
 BSAC
 bytestream
@@ -880,5 +881,6 @@ yearless
 Zalgo
 zoomable
 ZQSD
+Zstandard
 ZWNBSP
 ZWSP

files/en-us/web/http/headers/accept-encoding/index.md

@@ -7,7 +7,9 @@ browser-compat: http.headers.Accept-Encoding
 
 {{HTTPSidebar}}
 
-The HTTP **`Accept-Encoding`** {{Glossary("request header")}} indicates the content encoding (usually a compression algorithm) that the client can understand. The server uses [content negotiation](/en-US/docs/Web/HTTP/Content_negotiation) to select one of the proposals and informs the client of that choice with the {{HTTPHeader("Content-Encoding")}} response header.
+The HTTP **`Accept-Encoding`** {{glossary("request header", "request")}} and {{glossary("response header")}} indicates the content encoding (usually a compression algorithm) that the recipient can understand.
+In requests, the server uses [content negotiation](/en-US/docs/Web/HTTP/Content_negotiation) to select one of the encoding proposals from the client and informs the client of that choice with the {{HTTPHeader("Content-Encoding")}} response header.
+In responses, it provides information about which encodings are preferred in the content of a subsequent request to the same resource.
 
 Even if both the client and the server support the same compression algorithms, the server may choose not to compress the body of a response if the `identity` value is also acceptable.
 This happens in two common cases:
@@ -26,7 +28,7 @@ As long as the `identity;q=0` or `*;q=0` directives do not explicitly forbid the
   <tbody>
     <tr>
       <th scope="row">Header type</th>
-      <td>{{Glossary("Request header")}}</td>
+      <td>{{Glossary("Request header")}}, {{Glossary("Response header")}}</td>
     </tr>
     <tr>
       <th scope="row">{{Glossary("Forbidden header name")}}</th>
@@ -64,7 +66,7 @@ Accept-Encoding: deflate, gzip;q=1.0, *;q=0.5
   - : A compression format that uses the [Zstandard](https://en.wikipedia.org/wiki/Zstd) algorithm.
 - `identity`
   - : Indicates the identity function (that is, without modification or compression). This value is always considered as acceptable, even if omitted.
-- `*`
+- `*` (wildcard)
   - : Matches any content encoding not already listed in the header. This is the default value if the header is not present. This directive does not suggest that any algorithm is supported but indicates that no preference is expressed.
 - `;q=` (qvalues weighting)
   - : Any value is placed in an order of preference expressed using a relative [quality value](/en-US/docs/Glossary/Quality_values) called _weight_.
@@ -83,7 +85,7 @@ Accept-Encoding: gzip, deflate, br, zstd
 
 ### Weighted Accept-Encoding values
 
-The following request header shows `Accept-Encoding` preferences using a quality value between `0` (lowest priority) and `1` (highest-priority).
+The following header shows `Accept-Encoding` preferences using a quality value between `0` (lowest priority) and `1` (highest-priority).
 Brotli compression is weighted at `1.0`, making `br` the client's first choice, followed by `gzip` at `0.8` priority, and then any other content encoding at `0.1`:
 
 ```http