diff --git a/homeassistant/components/adguard/strings.json b/homeassistant/components/adguard/strings.json
index e34a7c88229..5b6a5a546f7 100644
--- a/homeassistant/components/adguard/strings.json
+++ b/homeassistant/components/adguard/strings.json
@@ -10,6 +10,9 @@
           "username": "[%key:common::config_flow::data::username%]",
           "ssl": "[%key:common::config_flow::data::ssl%]",
           "verify_ssl": "[%key:common::config_flow::data::verify_ssl%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of the device running your AdGuard Home."
         }
       },
       "hassio_confirm": {
diff --git a/homeassistant/components/airtouch4/strings.json b/homeassistant/components/airtouch4/strings.json
index 240b3e0007c..c810b991b8e 100644
--- a/homeassistant/components/airtouch4/strings.json
+++ b/homeassistant/components/airtouch4/strings.json
@@ -12,6 +12,9 @@
         "title": "Set up your AirTouch 4 connection details.",
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of the device running your AirTouch controller."
         }
       }
     }
diff --git a/homeassistant/components/airvisual_pro/strings.json b/homeassistant/components/airvisual_pro/strings.json
index b5c68371fdf..6f690c9eb4a 100644
--- a/homeassistant/components/airvisual_pro/strings.json
+++ b/homeassistant/components/airvisual_pro/strings.json
@@ -12,6 +12,9 @@
         "data": {
           "ip_address": "[%key:common::config_flow::data::host%]",
           "password": "[%key:common::config_flow::data::password%]"
+        },
+        "data_description": {
+          "ip_address": "The hostname or IP address of the device running your AirVisual Pro."
         }
       }
     },
diff --git a/homeassistant/components/alarmdecoder/strings.json b/homeassistant/components/alarmdecoder/strings.json
index d7ac882bb82..e1b5a774a87 100644
--- a/homeassistant/components/alarmdecoder/strings.json
+++ b/homeassistant/components/alarmdecoder/strings.json
@@ -14,6 +14,10 @@
           "port": "[%key:common::config_flow::data::port%]",
           "device_baudrate": "Device Baud Rate",
           "device_path": "Device Path"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of the machine connected to the AlarmDecoder device.",
+          "port": "The port on which AlarmDecoder is accessible (for example, 10000)"
         }
       }
     },