Do not select a topic simply because you think a lot of people will search for. You may not think that someone is interested in your topic, but that's ok. I will pretty much guarantee that someone is interested one way or another.
Four points to consider when choosing a topic.
* Keeping in mind that blogging requires a long term commitment. If you write about a topic you are interested in, then you will have long time commitment.
* Knowing your topic is very important. People will not hesitate to point out the subject matter mistakes.
* Always be passionate in your writing. This will assure more dedicated readers.
* Always write about a topic you are very familiar with. People will know if you are not very familiar with your topic by posting comments or loosing readers. This will also keep you from struggling with your topic.
People love to read and follow great content that interests them. So the topic is the key to attracting a huge audience.