If you're writing a blog aimed at a specific marketplace, such as tech or fashion, you do not necessarily wish to have it in the same style that you talk, especially if you've done a lot of research. You need to bear in mind exactly who you are aiming for and write for that market.
@Teddy, @Rumpunch Drunk, @Viktoria Michaelis I agree with your point but if you made blog about "MACHINE" and you write something about machine for example: machine definition
the first one is we generally speak ("Two or more simple machines working together to make work easier")
the second one is books definition ("A device that applies force, changes the direction of a force, or changes the strength of a force, in order to perform a task, generally involving work done on a load . Machines are often designed to yield a high mechanical advantage to reduce the effort needed to do that work.")
which definition you like to read and which one is easily understanding.
most of people in the web like to read text as you talk. many people hate to read book language.
Ah. Machines! Both of the definitions were understandable but then again, that depends on the person and what they want to read AND whether they require it in 'laymen's terms or more in-depth. I always prefer 'laymen's terms' with anything new or that I am learning about, so that I grasp it quicker. Maybe you need to first decide and focus on which audience you are trying to get, then write accordingly.