Persuasion is an attempt to persuade others, to convince, to change their beliefs and decision and to top all is for the other party to take actions after the persuasion.
Definitely there will be the good persuasion and the dark side of the action.
Friends persuade you to change your decision on where you should have lunch on that day and that is a mild persuasion, nobody get hurt but a full stomach.
Friends persuade you to take drugs and that is something for you to consider, but to justify the persuasion it is done openly, except you are taken in with your stupid ego.
And all on the above is still a mild example.
How about a Public Relations practitioner persuade you to change your beliefs on your political candidate and the candidate is the wrong one...what will happen..not so harmful you have another five years to topple him down but then for 5 years..how many damages and harm can come upon you and your country ?...eh..
That is the mild introduction on persuasion..