Do you have suggestion to university students who use linkedin?

LinkedIn has a great guide on what to include in your profile: https://university.linkedin.com/content/dam/university/global/en_US/site/pdf/TipSheet_BuildingaGreatProfile.pdf
A couple additional tips:
1. Start making connections with friends, family, professors, TAs! Whenever you meet someone new, from a job interview, internship, informational interview, talk on campus, make it a habit to add them on LinkedIn.
2. Make sure you add any part-time & summer jobs you've done. Recruiters are impressed by the job you had at a fast food restaurant or at the library on campus because it shows that you've been able to balance school and work, as well as you have "real-world" work experience.