It's mainly based on your business. If you like to target top-tier business people then LinkedIn and Twitter is the best place but LinkedIn is expensive. For any platform you choose for marketing Try short campaigns with minimum budget. Don't pour all your money into it without knowing its performance If your ad is not good then you lose all your money. First, Start ad campaigns on any three social media platforms with a low budget. use same ad banner for all and run it for 5 days using that data you can choose yours. Second, after choosing the platform, design at least two ad banners and try to split test it. Find out which is getting high clicks. After that design good landing page and modify that page if your conversions dropping out at that page till you get at least 10% conversions from those visitors.