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There’s not one easy answer depending on how your site is built. The following help article is a good place to start, however, optimizing your site’s speed will take more knowledge of how your site is currently scripted and how you will need to modify the scripting of the site to increase the load times.

http://support.godaddy.com/help/article/5780/how-can-i-speed-up-my-site

Tumblr is a bit controversial in the world of business blogging. Some people swear by it, and others say it is a waste of time – it doesn’t have the SEO capabilities or the customizability of the other two platforms, that’s for sure. If your target market is over the age of 35 , or if your business sells something that isn’t very visual, then Tumblr probably won’t fit your needs. But if you are in an industry or run a business that can use Tumblr to share images and quick updates, then you really should consider it despite its drawbacks.

My business  doesn’t use Tumblr because we are a document filing service – how many cool, viral images can you imagine coming out of that? But Tumblr is great if your product is visual and you are willing to spend the time to talk to and engage with your customers. Remember that Tumblr users are very reciprocal - that means it is up to you to go through posts, comment, and like if you ever expect to attract people over to your business’s page. It’s also very easy to use, and a bit addictive, so once you get going you’ll likely find yourself spending a lot of time on the site. Just remember to get a custom domain for your business’s Tumblr  and link to your blog on your homepage.

I hope this information will help you,

Good luck

Yes, because sharing the IP address with known adult or spam sites will raise a warning flag in the eyes of search engines, which may in-turn, lead to banning the complete IP address from its index.