Presenting yourself
When presenting yourself in a professional capacity you should separate your approach into: first impression and deep impression.
The first impression media is what you hand to or point out to potential new contacts, be they clients or possible collaborators.
This should be your social media accounts. But this should also be a good old fashion business card.
Make sure that both are good representation of your brand, i.e. does the style represent how you want to be viewed, is it memorable and easily recognizable. Also make sure that the most important information is easily comprehensible and findable on the first look.
The deep impression media is what you want people to find and get immersed in once you managed to make enough of a first impression that they made the move to your deep impression media.
The deep impression media, while also a good representation of your brand, should also allow a deep dive into your abilities and professional capabilities.
It should contain sections with your portfolio, but also of your references and your education background and the certifications you have as well as the gear that you have access to.
For you as an audio engineer a portfolio is a collection of your work samples and your professional identity in audio form. It reveals your technical skills in recording, mixing, mastering, and sound design, as well as your style and attention to detail.
Your portfolio should reflect your strengths and ambitions because audio engineering covers many areas—studio recording, live sound, music production, and podcast editing. It is a marketing tool that enables you to pitch for various roles confidently.
Select work that highlights your strongest skills and shows variety. For instance, include tracks where you performed mixing or mastering and projects showcasing your recording or sound design skills. Offer before-and-after samples to demonstrate how your work improved the audio, where possible.
Your portfolio should also be a living document that grows as you advance in your career. Regularly update it with new projects to reflect your latest skills and interests.
For the deep impression medium the best venue is to have your own website, where you fully control design and branding but also can be sure that your livelyhood stays under your control and is not a TOS change away from being deleted.
Which is a risk which you will always have if you keep this sort of important business presentation and communication in the hands of social media platform providers.