This tag has been burninated. Please do not recreate it. If you need advice on which tag to use, see the answer below. If you see this tag reappearing, it may need to be blacklisted.
Here is the excerpt for the research tag:
Research is creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of computer science, electrical science and communication science to devise new applications.
And the wiki:
In Stack overflow, tag research is intended to provide guidance and direction, rather than generic solutions.
There are a lot of research areas of Computer Science, Electrical Science and Communication Science. You can explore them and feel free to ask in stack overflow with tagging this keyword.
Not only is the wiki awful (they misspelled the site name in two different ways), but I think that it's wrong. You should not feel free to "explore them and ask in stack overflow with tagging this keyword".
This tag seems to be used for off-topic questions ("what should I research?") when it is not being used as a meta tag ("I'm a researcher" or "I'm reading some research").
Should this tag be burninated?
