Google+ has over one billion registered users, and out of which, 359 million are active! With this large audience base it is much easier to build your following but it will involve employing tactical methods. The first step to building a natural base of followers is to have a detailed profile with a summary of your professional background. It is advisable to have your personal and business profiles running concurrently.
Additionally, you should seek to maintain a continuous flow of valuable content to your Google+ page. Make your page a micro blog or to make sure your page is serving its intended purpose, produce content to attract the right audience.
It is important that you engage with your audience in a way that benefits them. This will make sure that you maintain and improve the following you have. The best way to achieve this is to look out for hot or trending topics. This can be something that many of your followers are talking about.