Info on a niche and blogging for a newbie

Good day
I hope this is the correct section. I read many times I must write many blogs and post them for my niche.
Well just to make sure must I post every day this blogs to my website where my niche is or on other sites?

Like I have for example this is not actually my niche I just like to use it for example
A website that sells iPhones
Now I must write every day a blog and post it to my same website.
Like Top 10 iPhones
best iPhone
how to repair iPhone
best iPhone apps

Going on like this.....

Sorry, I am all new to affiliate marketing. I have some low keyword niches and post them on my WordPress website but now get stuck at the blogging parts.

Pretty much, Just solve basic to advance problems of your products. Compare it with others and whatever it takes for promotion.