It will be determined if your product is a winner in the very early stages of product creation.
A very important stage of product creation is that you need to plan how you are going to create your product from a very early stage.
So for example if you are writing an ebook on how to lose weight you need to create one that will be comprehensive.
So if you do not do quality market research and include this chances are that your product will fail.
It is very easy to try and predict what products will be successful and sell.
Unfortunately what you may want is not necessarily what other consumers demand.
It is very easy to fall in the trap of creating products that nobody needs.
The best way to determine what consumers need is to ask them.
You can do this by sending out a mail to your opt in subscribers and asking them specifically what are the most important problems that they are experiencing in your niche market and then create a product that will solve this specific problem.
So once you have decided on your product you need to create it.
Before creating the product I suggest that you look at what other competitors in the market are doing.
Your product needs to be significantly better to make a consumer want to purchase your product.
I suggest that you take the unique selling proposition of your competitor and include it as a bonus in your product.
If your product is not significantly better than the other products you can compete by offering a much cheaper version.
After the product creation has been completed the best way to see how successful it is to test.
For example you can test different pricing strategies to see which maximizes sales and is the most profitable.