this is my question, who is will get high traffic, between using .blogspot.com or conventional domain like .com or .net, etc? Explain me why and how? Thank you.
For one, a .blogspot.com will have their Alexa ranking, where as your .com/.net has your own Alexa rank. I don't really understand your question though, as far as using which will bring you more traffic, I have no idea. You'll benefit in the end if you spend the extra few bucks for hosting/domain, much more flexibility
They get the same traffic because you will be promoting it. That aside go with a .com domain for sure
Traffic depends on the content and promotion of your website whether its a .com or a blogspot.com. Well that said and done, a .com with a self hosted wordpress blog gives you more freedom and you can modify in the way you want, you have the total authority. But with blogspot, the topmost control is with google, they can delete your blog or mark it as a spam if something goes wrong. So there are risks involved with blogspot blogs.
I would go for a dedicated domain name rather than blogspot or wordpress subdomains. I still use those for some non-profit blogs that are used just for pointing to my main sites.
blogspot blogs are good for those who wants to use it for personal use and have no interest taking it seriously, or on the other way they do not have enough funds for buying hosting and own domain name. But if you are really serious about making money, then go for your own domain name.
I started using a blogspot blog and added many posts over a few months. I regret it now though that I didn't go with my own domain and Wordpress since the flexibility is not so great. Buy your own domain and use Wordpress since it will increase your options in the future.
Google don't care, so it will not affect your ranking. But studies have shown that peolpe care and are more willing to click on a short .com domains than an .info or a subdomain.
You need your own domain, not the least because it will be harder for anyone to 'kill' it. Google can and do slap blogs at a moments notice. If you want to host a blog on your own server, use wordpress - far more useful. Having said that, create lots of 'feeder' blogs on blogspot to promote your 'main' site. best of all possible worlds! Bloggerhigh has a free ebook about autoblogging if you are interested in this strategy.
Blogspot is better if you are just starting out. But get your domain as soon as possible. It's quite risky geting a blogspot because you are subject to Googles whims, if they delete it there is nothing you can do.
It will depend on how well the seo work has been carried out. However, if both are on the same level I think search engine will give preferences and more weight to .com
Honestly, if it was about 3 months ago I would answer this like the most of the answers you got but now when I see the power of blogspot.com / wordpress.com I can tell you that domain name won't make any change of your earnings/traffic. If you got good content and you know how to promote it properly you'll earn a lot
get both - a .com is cheap as chips and a blogger blog is free, heck even hosting is cheap these days.
.blogspot.com is a sub-domain name. Google see a domain name is more important than a sub-domain name. Plus, if you are serious about your blog, you should get your own domain name.