Every day more number of searches about how to improve SEO and blogger or WordPress which is the best for getting more traffic, these platforms each having different kind of advantages and negative, there is important thing is what you need for your website/blog, we start with blogger, blogger is the platform for individual and perfect blogger it does  no require any coding knowledge any kind.You can incorporate to your content with images, video, widgets, etc., Blogger has concept of click and drag phenomenon.

In terms of improving search engine optimization(SEO) blogger not preferable,yes obviously blogger has top ranking instead of WordPress in Alexa, here the way blogger do, When it comes to Google as search engine despite of blogger is Google product,you will see mostly relevant tags from WordPress only.You will get 150 plus visitor with in two month, but blogger takes moe time and you have to build more links,that starts with 1000,so better improve SEO for business related, content exposed websites can use WordPress.  

There will be two version of WordPress free and shared host service,both comprises lot of traffic,dont worry about that just jump to WordPress if have blog/website for business and for promotional.Once you installed the Wordpress it will take care your site.