What really is concaternation?

Question

I dont really understand what concaternation does or what it is used for. Also what do these mean , ',? Do they exclude the values from that column?

Answer 1

concatenation is to joining of two strings essentially it is like if you have two string objects or two things inside " " and to concatenate would be to have them become one string object like ' ' +' ' = ' ' its not math its the merging of things in a linear manner