Hello dashingme. I agree with susi10. I used the title tuner when first starting out as a learning too. I read much more the options than chose to change to a specific. I felt it taught the idea more. Their tuner is fixed by the category chosen and those subcategories too. I discovered the title was correct in many cases when a reviewed what I was telling that contraption what I wanted.
I today use Google too. I discovered funny things like How Do gets more views than How To by an immense amount. So, I changed a whole bunch of titles. Remember like a stream and storm likened to new viewers and readers that stream of information may be different today compared to when I looked last - about 6 months back. Keeping titles current is a key gaining new exposure to a worn out market place if the hub is nose diving.
Remember the audience first, next the subject, ask if there is an objective, then choose the category wisely and if not sure I suggest leave the sub category alone. That only drills Google to market with indexing to a more specific marketplace not HubPages. Google indexes for the internet. You index for HubPages. Yet it is like 1 - 2 - 3. If 1 is wrong then so is 2 & 3 and so on.
Think of wearing clothes in layers for cold weather. Which comes first and etc.