String concatenation or in more simple words just basic string “addition” is basically combining two or more strings to form a looong string. As in the example.
we create a variable called myStr which is nothing but a container for our combined strings. Using the + operator to combine strings is not at all bad but there are far more better ways to get the same result without repeating our code.
It might seem strange and foreign at first but string concatenation is simply just adding strings like we add numbers. Hope that analogy helps