Precision refers to the closeness of a set of values obtained for identical measurement of a quantity. Precision depends on the limitations of measuring devices and the skills with which it is  used. However, accuracy refers to the closeness of a single measurement to its true value. 

The digits in a properly recorded measurement are known as significant figures. These are meaningful digits in a measured or calculated quantity. The greater the number of significant figures in a reported result, smaller is the uncertainty and greater is the precision. The zeros at the beginning are not counted. The zeros to the right of a decimal point are counted. In the numbers that do not contained a decimal point, “trailing" zeros may or may not be significant. The purpose of zeros at the end of a number is to convey the correct range of uncertainty.