Hi there! Welcome to HubPages!
1. HubPages is not a blogging site. it is a writing site.
2. Capsules can be place in articles. Capsules means you can put in text, photos, amazon deals, etc!
3. Articles are called Hubs at HubPages
4. The above are the basics. If you want to read more, check out my profile. I wrote quite alot about HubPages and writing online :)
Good luck and drop me a question if you want to ask something :)