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Summary

The LEFT function in Excel can be used to extract text from the left side of a text string. It can be used with other functions like LEN and FIND to extract text in more complex formulas.
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The LEFT function returns the first character or characters in a text string, based on the number of characters specified.
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The syntax of the LEFT function is LEFT(text,
).
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For example, to extract the first 3 characters from the text in cell A2, use this formula: LEFT(A2,3).
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According to

Summary
The Excel LEFT function is used to extract text from the left side of a text string. It can be used with other functions like LEN and FIND to extract text in more complex formulas. Examples of how to use the LEFT function are provided, as well as a link to a full explanation of the function.

How to use the Excel LEFT function | Exceljet
exceljet.net

Summary
LEFT returns the first character or characters in a text string, based on the number of characters you specify.
LEFTB returns the first character or characters in a text string, based on the number of bytes you specify.

LEFT, LEFTB functions - Microsoft Support
microsoft.com

How to Use RIGHT, LEFT, and MID Functions in Excel ... Excel's RIGHT, LEFT, and MID functions are used to extract a specific number of characters from a text ...

Excel LEFT Function | CustomGuide
customguide.com

Summary
The LEFT function in Excel returns the specified number of characters (substring) from the start of a string.
The syntax of the LEFT function is as follows:
LEFT(text, [num_chars])
For example, to extract the first 3 characters from the text in cell A2, use this formula:
The following screenshot

Excel LEFT function with formula examples
ablebits.com

The Excel LEFT function extracts a given number of characters from the left side of a supplied text string. For example, LEFT("apple",3) returns "app".

Excel LEFT function | Exceljet
exceljet.net

The Excel Left Function - Returns Characters from the Start of a Text String - Function Description, Examples & Common Errors

Excel LEFT Function
excelfunctions.net

There's no SUBSTRING function in Excel. Use MID, LEFT, RIGHT, FIND, LEN, SUBSTITUTE, ... To extract the leftmost characters from a string, use the LEFT ...

Substring in Excel (Easy Tutorial)
excel-easy.com