The relative dating is the technique to ascertain the age of the artifacts, rocks or even sites while comparing one from the other.
You will find the essential part of the answer to your question in this "Socratic" link: What remains to be seen is: when should you use the one rather than the other.
Relative dating is useful during field work to measure, for instance, the throw of a fault, or to re-instate the missing part of a stratigraphic sequence.
Absolute dating is a method of estimating the age of a rock sample in years via radiometric techniques.
Short Answer: The term relative dating is distinguished from absolute dating to make it clear that one does not get a specific estimate of the age of an object from relative dating, but one does get such an estimate of true age from absolute dating.
In the field of Geology, dating is an important term as it is a technique through which evaluation regarding the age and period about the fossil, remains, the archaeologists do valuables and artifacts.
At first, there were not many methods of dating were available, but now with advancement in the technology, we mainly have two types of the techniques to ascertain ages of ancient belongings.In other words, we can say that in relative dating the archaeologist determines that which of the two fossil or the artifacts are older.Contrary to this, the absolute dating is the technique, using which the exact age of the artifacts, fossils, or sites are ascertained.This evaluation of the rocks and fossils in the relative dating is known as the biostratigraphy.The absolute dating is the technique to ascertain the exact numerical age of the artifacts, rocks or even sites, with using the methods like carbon dating and other.Relative Dating and Absolute Dating are two types of such techniques which are under practice to determine the age of the fossils, objects or civilizations.