The best analogy that I can think of is anti-virus software for your computer. There are probably only 25 guys on the planet who can do good anti-virus protection on their own because it requires deep technical expertise. We have dozens of engineers who work on each of our products, which are designed expressly to fix or enhance your digital reputation and profile.
That said, there are certain things that you should do on your own, like have a thoughtful, well-curated LinkedIn profile. And you should have a Twitter handle that is your name, not something like “ILovePizza,” unless your job is in pizza.