The TEXT function applies the number format you specify to a numeric value, and returns a result as text.
In this case, the number format provided is "yyyymm", which joins a 4-digit year with a 2-digit month value.
Display only option
If you only want to display a date with the year and month, you can simply apply the custom number format "yyyymm" to the date(s). This will cause Excel to display the year and month together, but will not change the underlying date.
Dates and times in Excel are stored as serial numbers and converted to human readable values on the fly using number formats. When you enter a date in Excel, you can apply a number format to display that date as you like. In a similar way, the TEXT...
The Excel TEXT function returns a number in a given number format, as text. You can use the TEXT function to embed formatted numbers inside text.
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