diff --git a/examples/site/bearer_token/bearer_token.cc b/examples/site/bearer_token/bearer_token.cc
index 803b56c5..fad8408b 100644
--- a/examples/site/bearer_token/bearer_token.cc
+++ b/examples/site/bearer_token/bearer_token.cc
@@ -26,7 +26,7 @@
 namespace gcf = ::google::cloud::functions;
 
 namespace {
-/// A helper function to perform a HTTP GET request.
+/// A helper function to perform an HTTP GET request.
 gcf::HttpResponse HttpGet(std::string const& url,
                           std::string const& authorization_header);
 }  // namespace
diff --git a/google/cloud/functions/framework.h b/google/cloud/functions/framework.h
index bc795191..5caa46c8 100644
--- a/google/cloud/functions/framework.h
+++ b/google/cloud/functions/framework.h
@@ -26,7 +26,7 @@ FUNCTIONS_FRAMEWORK_CPP_INLINE_NAMESPACE_BEGIN
 /**
  * Runs function wrapped by @p handler.
  *
- * Starts a HTTP server at the address and listening endpoint described by
+ * Starts an HTTP server at the address and listening endpoint described by
  * @p argv, invoking @p handler to handle any HTTP request.
  *
  * If @p handler wraps a function with the Cloud Event signature, then the
@@ -34,11 +34,11 @@ FUNCTIONS_FRAMEWORK_CPP_INLINE_NAMESPACE_BEGIN
  * binding specification][cloud-events-spec].
  *
  * @note
- * When deploying code to Google Cloud Functions applications should **not** use
- * this function directly. The buildpack will automatically create a `main()`
- * and invoke `Run()` with the correct parameters. We recommend that application
- * developers use this function only for local development and integration
- * tests.
+ * When deploying code to Google Cloud Functions applications should **not**
+ * call this function directly. The buildpack will automatically create a
+ * `main()` and invoke `Run()` with the correct parameters. We recommend that
+ * application developers use this function only for local development and
+ * integration tests.
  *
  * @par Example
  * @code
@@ -64,14 +64,15 @@ int Run(int argc, char const* const argv[], Function const& handler) noexcept;
  *
  * @deprecated Prefer using the overload consuming a `Function` object.
  *
- * Starts a HTTP server at the address and listening endpoint described by
+ * Starts an HTTP server at the address and listening endpoint described by
  * @p argv, invoking @p handler to handle any HTTP request.
  *
- * When deploying code to Google Cloud Functions applications should **not** use
- * this function directly. The buildpack will automatically create a `main()`
- * and invoke `Run()` with the correct parameters. We recommend that application
- * developers use this function only for local development and integration
- * tests.
+ * @note
+ * When deploying code to Google Cloud Functions applications should **not**
+ * call this function directly. The buildpack will automatically create a
+ * `main()` and invoke `Run()` with the correct parameters. We recommend that
+ * application developers use this function only for local development and
+ * integration tests.
  *
  * @par Example
  * @code
@@ -94,15 +95,16 @@ int Run(int argc, char const* const argv[], UserHttpFunction handler) noexcept;
  *
  * @deprecated Prefer using the overload consuming a `Function` object.
  *
- * Starts a HTTP server at the address and listening endpoint described by
+ * Starts an HTTP server at the address and listening endpoint described by
  * @p argv, invoking @p handler to handle any HTTP request which *MUST* conform
  * to the Cloud Events [HTTP protocol binding][cloud-events-spec].
  *
- * When deploying code to Google Cloud Functions applications should **not** use
- * this function directly. The buildpack will automatically create a `main()`
- * and invoke `Run()` with the correct parameters. We recommend that application
- * developers use this function only for local development and integration
- * tests.
+ * @note
+ * When deploying code to Google Cloud Functions applications should **not**
+ * call this function directly. The buildpack will automatically create a
+ * `main()` and invoke `Run()` with the correct parameters. We recommend that
+ * application developers use this function only for local development and
+ * integration tests.
  *
  * @par Example
  * @code
diff --git a/google/cloud/functions/http_request.h b/google/cloud/functions/http_request.h
index bacb22ad..53c9827f 100644
--- a/google/cloud/functions/http_request.h
+++ b/google/cloud/functions/http_request.h
@@ -24,9 +24,9 @@ namespace google::cloud::functions {
 FUNCTIONS_FRAMEWORK_CPP_INLINE_NAMESPACE_BEGIN
 
 /**
- * Represents a HTTP request.
+ * Represents an HTTP request.
  *
- * Functions to handle HTTP requests receive an object of this class.
+ * Functions to handle HTTP requests receive an object of this type.
  */
 class HttpRequest {
  public:
diff --git a/google/cloud/functions/http_response.h b/google/cloud/functions/http_response.h
index f108eab1..88d0c4a6 100644
--- a/google/cloud/functions/http_response.h
+++ b/google/cloud/functions/http_response.h
@@ -31,9 +31,9 @@ namespace google::cloud::functions {
 FUNCTIONS_FRAMEWORK_CPP_INLINE_NAMESPACE_BEGIN
 
 /**
- * Represents a HTTP request.
+ * Represents an HTTP response.
  *
- * Functions to handle HTTP requests receive an object of this class.
+ * Functions to handle HTTP requests return an object of this type.
  */
 class HttpResponse {
  public: