What does the dot (.) stand for in math

The dot stands for multiplication for example
4 •6 = 24 same as 4x6=24

If you’re talking about decimals

It is a point or dot we use to separate the whole number part from the fractional part of a decimal number. ... The decimal point separates the whole number from the fractional part. Example: In the number 257.16, the decimal point separates the whole number 257 from the fractional part 16, which is 16 hundredths.