Premium Profile. This feature slaps a badge on your profile picture and search results. ...
Full List of Profile Views. ...
LinkedIn Learning. ...
Salary Insights. ...
Competitive Insights. ...
Higher Response Rate to InMail. ...
Increase In Profile Views.
Networking limit increased
Certifications from well known organizations like IBM, Microsoft, Twilio, Atlassian and more
Imail credits per month
AI writing feature

You can activate it on old as well as fresh accounts, the only condition is that you must not have a premium subscription currently active on the account for which you're trying to buy it!