charlenej 3

Is it really the keyword density tool you want to have or is it the keyword analysis tool? Keyword density tool is only used to check the denseness of keywords in an article, so if you only have 2-3 words to check, then I doubt you're asking for the right tool. If what you want is the tool to determine the competitiveness of each keyword, then I suggest that you use Google Adwords Keyword tool. It's a free keyword tool that can analyze the trend, level of competency and # of clicks per month.

mhanry commented: 5 +1

charlenej 3

If you're asking if XML map is necessary in SEO, then my answer is YES! Creating an XML sitemap in your website and sending it to search engines is among the necessary task of an SEO campaign. In order to bring in more targeted traffic to your website, XML maps are necessary.

Azmah commented: I agree +2

charlenej 3

Caching (Cache) happens when Google crawls a specific web page and take the snapshot of that particular page. And after it crawls to that specific webpage, it will update that page details to it's database and that process is called indexing.