There is a great deal that goes into marketing your business online. As Maury suggested, you first must distinguish what sets you apart from everyone else. Define you unique selling point. 

Next steps include:

1. Define your target audience - who would benefit from your services and is there a niche that you can target?
2. If you are marketing online, where does your audience gather information and socialize? Facebook? Instagram? LinkedIn?
3. After you determine the above, it’s time to create a strategy to reach your audience  online, whether it’s on a particular social media platform or via Google search ads or Facebook advertising, a well thought out organic and paid Social media, SEO and advertising strategy is needed.
4. Add to this a blog as part of your content marketing strategy to create brand authority and also as part of your SEO strategy.
   
5. And of course you need a website
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