RESEARCH is a systematic and defined technique of thinking employing specialized tools, instruments and procedures in order to obtain a more adequate solution of a problem than would be a possible under ordinary means.
Research gathers new knowledge or data from primary or first hand sources. Its purpose is to apply test as well as to evaluate the usefulness of a theory of knowledge.
It may also mean investigation and experimentation.
So what do we usually research? I think it's normally - people and their behavior. We also conduct research to gather some knowledge about politics, health and animals.
Some people do research about their crushes' interests, or in short - they are stalking them. Ehehehe :D