How to choose the right niche?

[krister]

Hello everyone! Could you please comment on my niche ideas. My main concern is that these niches are too broad.
Casino bonuses
Casino payment methods
Casinos by slot studios

[gil.langelaan]

Hey!

I think you need to change your question a bit to make it more specific.

Do you only want to launch new website or you already have one?
What market is your target?
What is your main purpose?

Describe what you are planning to do and your purpose in the end and somebody could help you here.

[PaulEchere]

Hi,

Based on the three points you have there - you are really looking at one niche, which is "casinos".
How to approach it on the other hand is a different question and as Gil mentioned above - the starting point would be the region you are targeting.
What to target will largely depend on what your target audience is interested in and that may drastically vary depending on the place you are targeting.
So first I would recommend answering the following questions (for yourself):
What is the the region?
What is the competition in that region?
What are people mostly searching for / interested in?
What brands can you potentially start working with?

As I see it, the above should be a good starting point to figure out where you are and where you are heading.