Answer:
"your only pay is how much tip you earn, so it varies depending on how well you serve your customers."
^
However true this is not the entire truth; servers/waiters do get paid a very small salary depending on where you reside. For instance in Texas the wages are around $2.13-$2.15 an hour +tips and in NY the wages start at around $4.15 ish +tips. You must claim tips every day you work and the tips that you claim + your salary must be equal to or greater than the specific states minimum wage; If it is not than the restaurant you work for must pay you the difference .