There is no one-size-fits-all answer to this question, as the best way to attract your target audience will vary depending on who your target audience is and what they're interested in. However, some general tips that may help include:
figuring out where your target audience hangs out online and spending time there yourself (for example, if they're active on particular forums or social media platforms);
sharing helpful and relevant information that your target audience is likely to find useful;
being friendly and engaging if you do end up interacting with members of your target audience; and
overall just making sure that your online presence is professional and polished, as this will help you attract more attention from your target audience.