The money is in the niche, as well as in the list. To sell online you must first find a niche, so the first step is by looking for trends, needs or wants of the general buying public, and the second thing to do is to promote to that niche.
first you must look for words people are using to find help or solutions to their problems, or articles that can help them resolve or fulfill their needs.
Are you new to internet marketing? If you are confused and don't know what to do to start making money online, the best thing to do is start writing.
Since the internet is built up mostly of written works, you will always find an opportunity to earn if you can write. You don't have to be an "Einstein" or a "Shakespeare" to start writing.
If you can present a useful information, write about it clearly and understandably, then you can use that to make...