Most social media platforms have sophisticated tools you can use to ensure you are targeting individuals and organisations with relevant demographics.
You can choose by age, gender, location, hobbies, work, disposable income, interests, and so on. You can use hashtags and keywords to further identify your feeds as delivering content that is relevant to specific audiences. However, this will still not guarantee that everyone who follows you is a bona fide potential customer.
It may well be that employees, potential employees, partners, suppliers, associates, members of the public, students, industry influencers, bloggers and journalists all follow your feeds –this is good news, because they are all by definition people who are active in the digital space who are interested in your company. However, you will always gain inappropriate followers, simply because that is a basic reality of the social media world, so it is essential to clean up follower lists on a regular basis on all social media channels to avoid negative outcomes and spam-related issues.