a dedicated audience for any blog is to carefully and clearly define its target audience right from the start, and then create content that caters to that audience.
Focusing on a niche audience and developing appropriate content specifically for those people helps to ensure there will be strong interest in your blog's content, plus it makes promoting the blog easier.

It's virtually impossible to brainstorm a totally original topic to blog about. Instead, your primary and ongoing goal should be to continuously develop innovative content and put a truly unique spin on whatever topic you're blogging about.

To build and maintain a steady audience, regularly add new content to your blog. Every new blog entry should cater to your blog's target audience, offer content that's perceived as valuable, and build upon previously published content.
For a blog to be successful, you must stay on topic and cater to the wants, needs and expectations of your target audience. This means developing a thorough understanding of who your audience is, then adjusting your focus as trends and demands change over time.

Instead of focusing exclusively on publishing content, develop your blog into an interactive online community. Encourage your audience to post feedback and comments, interact with each other, share their ideas, and enhance your content by adding their own information.

It will take some time to build an audience in the hundreds of thousands or millions. To achieve this level of success will typically require ongoing marketing, promotions and even paid advertising. Many of the world's most successful bloggers have relied on the mainstream media to generate publicity for their blog to help build an audience.