diff --git a/definitions/staging/stg_AGENT.sqlx b/definitions/staging/stg_AGENT.sqlx
index c7fec84..666bedb 100644
--- a/definitions/staging/stg_AGENT.sqlx
+++ b/definitions/staging/stg_AGENT.sqlx
@@ -9,6 +9,11 @@ config {
   description: "All fields that are connected to the AGENT"
 }
 
+/* 
+Originally AGENT_NAME field contains both name and languages of the agent.
+They can be divined by different variations of signs. Next 2 subqueries extract AGENT_NAME and LANGUAGES
+into 2 different fields for calls and digital data.
+*/
 with agent_digital as (
     select AGENT_ID,
         case
@@ -61,12 +66,13 @@ agent_calls as (
         timestamp
     from ${ref("stg_calls")}
 ),
+-- Union of the agents for digital and calls
 all_agents as (
     select * from agent_digital
     union distinct 
     select * from agent_calls
 ),
-
+-- Deduplication by AGENT_ID and Timestamp. It is necessary because agent characteristics can change over time
 all_agents_dedup as(
     select *,
          ROW_NUMBER ()   
@@ -74,7 +80,7 @@ all_agents_dedup as(
   from all_agents
 
 )
-
+-- Add of the codes and ids with mapings
 select all_agents_dedup.AGENT_ID,
        all_agents_dedup.AGENT_NAME,
        all_agents_dedup.LANGUAGES,
diff --git a/definitions/staging/stg_calls.sqlx b/definitions/staging/stg_calls.sqlx
index 9c8e0ae..be6f73d 100644
--- a/definitions/staging/stg_calls.sqlx
+++ b/definitions/staging/stg_calls.sqlx
@@ -9,7 +9,8 @@ config {
   dependencies: ["calls_data_freshness"],
   description: "All history data for calls"
 }
-  
+
+--Filter out abandoned calls and numerates by key for deduplication
 with calls_deduplicated as (
 select  *,
         ROW_NUMBER()
@@ -17,7 +18,7 @@ select  *,
           row_number
 from ${ref("pphe_five9_raw","calls_*")}
 where ABANDONED is not null
-${ when(incremental(), `and _TABLE_SUFFIX = FORMAT_DATE('%Y%m%d',current_date("Europe/Amsterdam"))`) })
+${ when(incremental(), `and _TABLE_SUFFIX = FORMAT_DATE('%Y%m%d',current_date("Europe/Amsterdam"))`) }) --last date table is taken
 select DAY_OF_WEEK,
         CALL_ID,
         CAMPAIGN,
@@ -26,6 +27,7 @@ select DAY_OF_WEEK,
         AGENT_NAME,
         ANI,
         CALL_TIME,
+        --time data is loaded in seconds. Extra columns for times in formt hh:mm:ss are added
         regexp_replace(
             cast(time(timestamp_seconds(cast(CALL_TIME as int))) as string), 
             r'^\d\d', 
diff --git a/definitions/staging/stg_calls_history_report.sqlx b/definitions/staging/stg_calls_history_report.sqlx
index 5210a0d..0fc58ce 100644
--- a/definitions/staging/stg_calls_history_report.sqlx
+++ b/definitions/staging/stg_calls_history_report.sqlx
@@ -12,6 +12,7 @@ config {
   description: "Main calls data for history report"
 }
 
+--Extraction and transformation of fields that are used in Board load further. Contains all history data
 select sc.SESSION_ID,
        sc.DNIS,
        sc.TIMESTAMP,
@@ -25,7 +26,7 @@ select sc.SESSION_ID,
        case
        when sc.ROUTING_HOTEL_NAME is null
        then '_'
-       else ifnull(p.BOARD_PROPERTY_GROUP, 'ADD') 
+       else ifnull(p.BOARD_PROPERTY_GROUP, 'ADD') --for check of the missed properties
        end BOARD_PROPERTY_GROUP,
        sc.AGENT_ID,
        sc.AGENT_NAME,
diff --git a/definitions/staging/stg_calls_report.sqlx b/definitions/staging/stg_calls_report.sqlx
index edd93b7..7edb2b9 100644
--- a/definitions/staging/stg_calls_report.sqlx
+++ b/definitions/staging/stg_calls_report.sqlx
@@ -15,6 +15,7 @@ config {
   description: "Main calls data for report"
 }
 
+--Extraction and transformation of fields that are used in Board load further. Contains last 7 days
 select sc.SESSION_ID,
        sc.DNIS,
        sc.TIMESTAMP,
@@ -28,7 +29,7 @@ select sc.SESSION_ID,
        case
        when sc.ROUTING_HOTEL_NAME is null
        then '_'
-       else ifnull(p.BOARD_PROPERTY_GROUP, 'ADD') 
+       else ifnull(p.BOARD_PROPERTY_GROUP, 'ADD') --for check of the missed properties
        end BOARD_PROPERTY_GROUP,
        sc.AGENT_ID,
        sc.AGENT_NAME,
diff --git a/definitions/staging/stg_digital.sqlx b/definitions/staging/stg_digital.sqlx
index 55cbf7c..0b9a320 100644
--- a/definitions/staging/stg_digital.sqlx
+++ b/definitions/staging/stg_digital.sqlx
@@ -10,16 +10,18 @@ config {
   description: "All history data for digital"
 }
 
+--Numerates by key for deduplication
 with digital_deduplicated as (
 select  *,
         ROW_NUMBER()
           OVER (PARTITION BY SESSION_GUID)
           row_number
 from ${ref("pphe_five9_raw","digital_*")}
-${ when(incremental(), `where _TABLE_SUFFIX = FORMAT_DATE('%Y%m%d',current_date("Europe/Amsterdam"))`) })
+${ when(incremental(), `where _TABLE_SUFFIX = FORMAT_DATE('%Y%m%d',current_date("Europe/Amsterdam"))`) }) --last date table is taken
 select  AGENT_NAME,
         COALESCE(DISPOSITION, '[Not Defined]') AS DISPOSITION,
         RESPONSE_TIME,
+        --time data is loaded in seconds. Extra columns for times in formt hh:mm:ss are added
         regexp_replace(
             cast(time(timestamp_seconds(cast(RESPONSE_TIME as int))) as string), 
             r'^\d\d', 
diff --git a/definitions/staging/stg_digital_history_report.sqlx b/definitions/staging/stg_digital_history_report.sqlx
index 477794f..485a306 100644
--- a/definitions/staging/stg_digital_history_report.sqlx
+++ b/definitions/staging/stg_digital_history_report.sqlx
@@ -11,7 +11,7 @@ config {
   description: "Main digital history data for report"
 }
 
-
+--Extraction and transformation of fields that are used in Board load further. Contains all history data
 select d.SESSION_GUID,
        d.TIMESTAMP,
        date(d.TIMESTAMP) DATE,
diff --git a/definitions/staging/stg_digital_report.sqlx b/definitions/staging/stg_digital_report.sqlx
index 0f17213..c5bdae4 100644
--- a/definitions/staging/stg_digital_report.sqlx
+++ b/definitions/staging/stg_digital_report.sqlx
@@ -11,6 +11,7 @@ config {
   description: "Main digital data for report"
 }
 
+--Extraction and transformation of fields that are used in Board load further. Contains last 7 days
 select d.SESSION_GUID,
        d.TIMESTAMP,
        date(d.TIMESTAMP) DATE,