A Char is a single element in a string array, such as 'A'
When you define a string you define it as a 1D array of chars such as:
char buffer[27] = "My String";
When you define a STRING Array, you define a multi dimensional char array, such as:
char buffer[3][27] = { "Element 1", "Element 2", "Element 3" };
Which you get the string from the array like:
buffer[0] == "Element 1";
buffer[1] == "Element 2";
buffer[2] == "Element 3";