If you are new to Blogging or are still floundering abut for a topic to blog with, remember thet your topic should be something that you are passionate about,you are an expert in or some research & write about . Your visitors, in all likelihood , will be just as intrested as you are .
You must also try to make the topic as broad as possible to give you wide choiceof visitors.
with narrow topic it may be difficult. Only that topic should be chosen which deteeermine your abilty to turn it into a revenue source.
Hope you will Stick to your topics like an Adhesive.