Well, sky is the limit!
Focus on providing high quality content to your users, solve their problems through well-written articles, and earnings will happen naturally.
The exact figures depend on various factors like:
- the niche you choose
- how thorough and interesting your blog’s content is
- the design of your blog
- how actively you promote your blog
- the kind of affiliate programs you’ve tied up with
Bloggers earn anywhere from $10 to hundreds of thousands every month.
The amount of time you put in and consistency in your efforts is the key.