Facebook is the leading social media with a huge base of active users. Thus, advertising on Facebook gives you the opportunity to target a wide audience. Also, Facebook ads are very cheap.
Yes, Facebook gives the opportunity to create ads to every individual or business. Although, creating great ads is not that easy. An advertising agency can help you achieve your goals by running successful campaigns and make your brand seen by the right audience.
Yes, you can even run different campaigns on the same social media platform as well. Facebook is one of the best platforms to advertise on, because it provides you with a huge audience. However, depending on your business and your goals, you can run ad campaigns on any social media that provides you with the best results.