The importance of visiting the right websites for professional profiles cannot be overstated as not every website can be relied upon for accurate information about an individual. It is important to identify who you may be looking for information about before picking an appropriate website that can provide you with information about them. This is because professionals can be found on certain types of websites and other individuals on other types of websites.
If you are looking for professionals then social sites like LinkedIn would be ideal. Many professionals will have their profiles uploaded on LinkedIn where they maintain an active account. In order to use LinkedIn to research about individuals, you will have to create your own account which does not take too long either.
You can have your own account created on LinkedIn by using your email or mobile number. You do not have to create your complete LinkedIn profile right away but if you do then you will be able to properly interact with other professionals in order to enhance your own career goals. With basic login information however, you are able to look up profiles of professionals who have accounts on LinkedIn. See https://www.linkedin.com/in/ahmed-omarjee-26a4aa2b for an example profile of a person named Dr Ahmed Omarjee.