Using a .pro domain conveys a more professional and trustworthy image compared to more generic domains. Having a .pro domain can reinforce your clients' perception of your experience and knowledge in a professional sector and mentally position you as a reference in your field.
In a crowded online space, having a specific domain can help differentiate your online presence. A .pro domain clearly indicates that you are a professional in your sector, which is undoubtedly beneficial in terms of marketing and branding and public perception of your brand and helps you attract customers.
Since the .pro domain extension years ago was restricted to professionals who had to certify it, there is much more .pro domain availability. Now the .pro domain no longer has requirements and it is very likely that you can register the domain you want with the .pro extension, something that does not happen with the most common extensions.