Element of the eightfold path relating to ethical conduct with the context of one's occupation or livelihood.
Right livelihood (pi samma ajivo) is the third factor or the virtue section of the Noble Eightfold Path. It deals with the way to maintain ones existence, things like jobs, earning ones needs but also maintaining ones live in regard of other entertainments/sustenance which means to provide one self with certain joy for ones particular existence.
Since livelihood is something one can not easily change and is even caught in such, the Buddha was always where discrete in talking about this issues and stayed merely on a general matter like his definition for right livelihood:
"And what is right livelihood? There is the case where a disciple of the noble ones, having abandoned dishonest livelihood, keeps his life going with right livelihood: This is called right livelihood." — SN 45.8
but that also gives the certain freedom to correct it as good as possible where ever one is and does not lack on the proper advice even in regard of the most noble livelihood, the life as a Noble beggar (Bhikkhu or Bhikkhuni, Mon or Nun), in its fine nuances of right and wrong.
However, there are certain livelihood one, as a follower of the Buddha, should abstain, to gain best possibilities for path-development:
"A lay follower should not engage in five types of business. Which five? Business in weapons, business in living beings, business in meat, business in intoxicants, and business in poison." — AN 5.177
So this tag is proper used for all questions in regard of occupation, job, lifestyle, business, behavior as student, trainee, child, being housekeeper and so on, related to the Buddhist practice.
