What is/was the use of Pascal's Triangle?

I personally am mathematically declined...!, but see below

Pascal's triangle is named for 17th century French mathematician Blaise Pascal. Pascal wrote a treatise on triangles in his 1654 (published 1655) treatise Traité du triangle arithmétique. However, Pascal did not invent the triangle, so it bears different names in other countries.

In algebra and other branches of mathematics, Pascal's triangle is a triangular array of numbers that lists the coefficients of the expansion of any binomial expression (x + y)n, where n is any positive integer and x and y are real numbers. Its construction is simple: the numbers in each row are the sum of the numbers in the preceding row. So, each row begins and ends with the number 1.

How to Use Pascal's Triangle (Binomial Theorem)
The binomial theorem states that the nth row of Pascal's triangle gives the coefficients of the expanded polynomial (x + y)n.

https://sciencenotes.org/pascals-triangle/

Pascal's triangle is a wonderful piece of mathematics that can be created and understood by a primary school child and yet hides dozens of fascinating properties and links to real world applications, including probability, combinatorics and algebra. The triangle is constructed starting with '1' in the top row. Each subsequent row is offset by half a place, and has one more number in it. Each number can be found by adding the two above it (if only one number is above, add 0 to it). The triangle is in principle infinite, though I'm not sure anyone has ever managed to write out that many lines. The first 5 rows look like:

1
1 1
1 2 1
1 3 3 1
1 4 6 4 1

(well technically the first row is the 0th row and the last shown is the 4th, is that still 5 rows?)

The most common application of the triangle is to find the coefficients of the binomial expansion. For the expression "(x+y)^n", the nth row of the triangle lists out the coefficients of the expanded expression - e.g. 1,4,6,4,1 if n = 4

Another application that is perhaps easier to grasp intuitively is that for the nth row, the kth entry in that row (again starting from 0 as the first entry)) is given by the function nCk (n choose k). Put simply this function tells you how many ways there are to pick k objects out a of a group of n. One example is how many teams of 2 can be picked from a group of 4 people - the triangle tells us that the 2nd entry from the 4th row is 6, so 6 different teams can be created.

There are so many other patterns and connections hidden within the triangle, many well beyond my level to comprehend. The practical uses are largely superseded by calculators and computers, but the table still provides a useful reference to do these tasks manually. I think the real use is to demonstrate how interconnected seemingly independent aspects of mathematics and real world applications can be, and just to enjoy a pure piece of wonderful mathematics.