Read the article
Start with the basics. A clear photo of your face, in good light, in plain clothes. It does not need to be a studio picture. A headline that says what you are: 'Final-year B.E. Computer Science student at [college]. Interested in data analysis and web development.' Most students leave the headline as 'Student', which wastes the line that appears in every search and message.
Write a short summary, three or four sentences in your own voice. What you are studying, what you have built or learned, and the kind of work you are looking for. 'I am a final-year student who enjoys turning messy data into something people can use. My project analysed bus delays in our city using public data.' This is more useful than a paragraph of adjectives.
Add your education with the same dates and degree name as your resume. Mismatches make a recruiter wonder which is right.
Add projects, internships, courses and certificates, each with a line on what you did. Link to a repository or a demo if you have one that is tidy. Leave out anything you could not discuss. Your profile is public, and anyone can ask about what is on it.
Skills: choose a few that you are confident in. Endorsements from classmates help a little, but they matter less than clear descriptions in the projects.
Then build a small network, starting with people who know you: classmates, faculty, seniors, people from your internship. Connect with them first. The people you meet at college events and talks, such as a guest speaker, are good contacts too, and a short note the same week helps them remember you.
When you message someone you do not know, be specific and brief. 'Hello Ms Rao, I am a final-year student at [college]. I read your talk on supply chain careers and wondered what you would suggest a student learn before a first job in the field. Thank you either way.' Do not ask for a job in the first message. Do not send the same text to fifty people; it shows.
And keep it up to date. Add a project when you finish it and a certificate when you get one. Posting is optional. If you do, share something you actually learned or did, not a copied motivational quote.
Finally, search for your own name while signed out. Whatever shows up is what a recruiter sees. If something you would not want an interviewer to read appears, change it or its privacy setting.