diff --git a/homeassistant/components/reolink/strings.json b/homeassistant/components/reolink/strings.json
index 5b26d70b657..5a27f0e38cb 100644
--- a/homeassistant/components/reolink/strings.json
+++ b/homeassistant/components/reolink/strings.json
@@ -10,6 +10,9 @@
           "use_https": "Enable HTTPS",
           "username": "[%key:common::config_flow::data::username%]",
           "password": "[%key:common::config_flow::data::password%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your Reolink device. For example: '192.168.1.25'."
         }
       },
       "reauth_confirm": {
diff --git a/homeassistant/components/rfxtrx/strings.json b/homeassistant/components/rfxtrx/strings.json
index 85ddf559cf5..9b99553d3f0 100644
--- a/homeassistant/components/rfxtrx/strings.json
+++ b/homeassistant/components/rfxtrx/strings.json
@@ -19,6 +19,9 @@
           "host": "[%key:common::config_flow::data::host%]",
           "port": "[%key:common::config_flow::data::port%]"
         },
+        "data_description": {
+          "host": "The hostname or IP address of your RFXCOM RFXtrx device."
+        },
         "title": "Select connection address"
       },
       "setup_serial": {
diff --git a/homeassistant/components/roomba/strings.json b/homeassistant/components/roomba/strings.json
index f1816d58613..654c1b7fdfc 100644
--- a/homeassistant/components/roomba/strings.json
+++ b/homeassistant/components/roomba/strings.json
@@ -7,6 +7,9 @@
         "description": "Select a Roomba or Braava.",
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your Roomba or Braava."
         }
       },
       "manual": {
@@ -14,6 +17,9 @@
         "description": "No Roomba or Braava have been discovered on your network.",
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your Roomba or Braava."
         }
       },
       "link": {
diff --git a/homeassistant/components/ruckus_unleashed/strings.json b/homeassistant/components/ruckus_unleashed/strings.json
index 769cde67d7a..65a39e5e218 100644
--- a/homeassistant/components/ruckus_unleashed/strings.json
+++ b/homeassistant/components/ruckus_unleashed/strings.json
@@ -6,6 +6,9 @@
           "host": "[%key:common::config_flow::data::host%]",
           "username": "[%key:common::config_flow::data::username%]",
           "password": "[%key:common::config_flow::data::password%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your Ruckus access point."
         }
       }
     },