E-commerce may take place on retailers' Web sites or mobile apps, or those of e-commerce marketplaces such as on Amazon, or Tmall from AliBaba. Those channels may also be supported by conversational commerce, e.g. live chat or chatbots on Web sites. Conversational commerce may also be standalone such as live chat or chatbots on messaging apps[73] and via voice assistants.[3]
Amazon, the elephant in the room of the sales tax discussion, has changed its stand on the internet sales tax issue. Originally, the company fought to have internet sales tax imposed on purchases, but now it has distribution centers (tax nexus) in almost every states. In 2017, the company announced that it would charge sales tax on all its transactions, except for states that don't have sales tax. 
Social media marketing on its own is free to use, as is content marketing if you’re creating and managing the content yourself. Several email marketing platforms have free plans for your first few hundred or thousand subscribers, giving you time to get your revenue increasing before you have to start paying. There are even free keyword research tools like Google’s Keyword Planner that can help you optimize your site at no cost.
Social media has been one of the fastest growing digital marketing channels for years now and continues to play a major role in brand development and customer acquisition and engagement. Social media now is a critical element to effective content marketing and search engine optimization strategies. These marketing strategies simply can’t exist well without one another.
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