Yoroshiku is an “ambiguous but useful” Japanese word.
Contains emotion to ask goodness as below ;
1.Nice to meet you -
When your friends introduce you, you will say it with smile.
2.Please do it better – When you ask someone to do any task, you can add this usable word.
Be careful, this is a little casual so that you cannot use to your boss, teacher nor unknown person. It will be suitable if you add onegaishimasu(please; polite) behind…“Yoroshiku-onegaishimasu”, then your impression will be really fine for everyone.
Additionally, Yoroshiku-ne is also used. ne doesn’t have any meaning…but just feeling calm, sometimes sweeter.
Let’s say “Yoroshiku~” when you ask your colleague extra-tasks!