Blogger allows you to create a simple hosted blog using your Google account. No HTML knowledge is needed as Blogger gives you basic editing tools (you can still dip into the source if you want to).
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Pro No ads
You can turn on ads if you want, but you can also keep your Blogger blog ad-free. That is different from WordPress.com (free hosted WordPress) where there are ads, and you cannot do anything about it.
Pro Custom domain support
You can use either your own URL or a *.blogspot.com URL.
Pro Supports multiple authors
Multiple people can contribute to a single blog.
Pro Every Google account has one
If you have a Google account from any other of their services, such as Gmail, Youtube or Google+, you automatically have a Blogger account as well.
hosted by google
Pro Allows custom advertisements
Such as project wonderful, or just google adsense,. so you can make money from your blog.
Pro Android and iOS mobile apps
Allows viewing and editing content from your mobile device.
Pro Analytics integration
There's very basic analytics, but you can upgrade if needed.
Con Dated layout
Blogger hasn't had any major design changes in years and it shows.
Con Limited authorization system
Sadly the authorization system is fairly limited. Co authors can post and publish, without you getting a chance to pre-check their posts as an admin. e.g. you can't give them "create" and not give them "publish" permissions. They can only edit their own posts however.
Con Can be very slow
Loading times can be huge - results may vary on your use of template, but even a fairly lightweight template can load quite slow.
Con Not fully HTML4 or 5 compliant
And impossible to get it perfectly accepted by the W3C verifier no matter how much you tinker.