If you have stayed or worked in Singapore as a foreigner then obviously you know what is PR and how relevant it is.
A PR refers to a foreigner who has been granted permanent residence status which allows him/her to reside in Singapore on a permanent basis. PRs aged 15 years and above will be issued with the Singapore blue Identity Card (IC). A PR can stay in Singapore without a valid job, can start his/her own business freely, and generally gets all the perks on par with a citizen except some.
As a foreigner, you are eligible to apply for permanent residence if you are a/an: