I don't have much of an online presence. I do have a LinkedIn but it hasn't been updated in a while. I've always had luck gaining employment just by applying or starting as a contract employee and being hired quickly but I see the benefit of it. Three examples that personally could add value for me are simply using it, scrubbing anything not of relevance, and beginning to network! In networking I could begin to transition my page from current connected pages to more that align with my degree. I think this is the most important of examples of what hiring managers (including myself if I was one) would find appealing. Another would be joining a Honor Society in that field (once qualified and if one is available at your university). If I was a hiring manager in my particular field I would want to see that candidates know what they're talking about where Marketing is concerned and show accolades they've accomplished while in the field or educating to join the field. Also, having a network of individuals in the field who can verify your skillset is also a plus especially if the prospective employee somewhere shares a network with