Hi Mr.Bennet,
Forgive me, but am busy these days
2- Shared
3- This is from W3TC FAQ,and answers your question
What if I don’t want to work with a CDN right now, is there any other use for this feature?
Yes! You can take advantage of the pipelining support in some browsers by creating a sub-domain for the static content for your site. So you could select the “Origin Push / Self-hosted” method of the General Settings tab. Create static.domain.com on your server (and update your DNS zone) and then specify the details for it in the plugin configuration panel and you’re done. If you disable the scripting options on your server you’ll find that your server will actually respond slightly faster from that sub-domain because it’s just sending files and not processing them.
4- I have visited your website,but it’s in Swedish, so I couldn’t understand a thing, but I got the picture, take this example of a muscle exercise,
Excercise: One-hand Triceps Smasher
Category: Body Building
Can be Done by: Dumbbells, Cables (YOUR TAGS).
Note that all the above information is normal post taxonomy.So, let’s see how this information is best sorted out, it have to go bottom-up, from very detailed to less and so on.
<h1> One hand triceps smasher (Post Title)
<h2> Dumbbells exercises & Cables Exercises (Tags)
<h3> Body Building. (Category)
It should goes this way, search engines spiders crawls for details and not generic terms, this is called funnel up. If you want further drills, install sub title, and it can go this way:
<h1> Triceps Smasher (Post Title)
<h2> One hand Exercise (Post Sub-title)
<h3> Dumbbells exercises & Cables Exercises (Tags)
<h4> Body Building. (Category).
Please note that H1 & H2 are mandatory, but H3 & H4 are getting popular because of the fact that keywords rules are very strict because of their overuse.
I have made a simple plugin that copies the upper structure in their respective Meta tags (Title,Description & Keywords), I can pass you the code, so it would be a hell of a task.Anyway, I am just covering your H1 and H2
5. DNS are not bought, they are only configured through proper DNS records. Give me details about your concern in this matter.