they have written black and white documents with targets that u need to meet during the PIP, and even if u meet them, they still can fire u off actually and say u didnt meet the target, PIP is just a formality and to protect the company in case the employee sue the company for unfair dismissal

and yes its one of the ways for the bosses to kenakan employees that they dont like or have beef with, last time my ex company 1 staff kena, he was star performer in his team for many quarters and even won award in the company as a star performer, then one day his team change manager and the new manager didnt like him, and put him in PIP to force him out, end up he resigned also

in the end management sided with the new manager iirc, and he resigned himself, im not really sure of the full details because he is in another team but i did see his name in the company star performer award a few times during townhall meetings, and one day he suddenly resigned just like that, many ppl were shocked, then i go kepoh from other colleagues what happened, and all i heard is the team change to new manager for a few months, and PIP

a bit out topic
but just to give another prospective

You think most ppl in corporate are capable or qualified for their job?

Leaving corporate is the best decision I ever made
(although left the 5 fig paycheck behind)

I'm lucky as I explored
wht I interested to do
wht I good at
wht I capable to do

years before I left the company
and never looked back