There are a lot of ways to increase your online visibility but it all comes down to increasing your findability.
When you sign up or create an online profile make information as public as possible. This helps distinguish you from others with the same, or similar, names.
Creating a public Google Scholar profile is an easy way to increase your findability and it also provides other benefits such as an author H-index, citation counts, and more.
Methods for increasing visibility (and their acceptability) vary in each discipline.The following are merely suggestions/ideas to get you thinking: