Records in Power Query
The record in Power Query is nothing we can consider a single row of a table, where each record has the field name(s) which is nothing but the column name, and its value(s).
Example: Create a record in the power query.
Power Query M
let
    Source = [ Name = "Ashish Goel", Company = "TCS", Education = "MTech" ]
in
    Source  The output of the above code is shown below:

Accessing Record Field Value
To access the field value from the record, use the field name within square brackets.
Syntax [Record][Field_name]
Example:
Power Query M
let
    Source = [ Name = "Ashish Goel", Company = "TCS", Education = "MTech" ][Name]
in
    Source  The output of the above code is “Ashish Goel”.