- Amount of time visitors spend on your site / blog
- How many pages have they viewed
- What percentage have returned back
- What is the percentage of new visitors
- Which country and city do they come from
- What is the ratio of search engine traffic
- How many have come from your promoted links on twitter facebook etc
- Which keywords did they search and ended up on your site / blog
- Which keyword is responsible for greatest hit on your site
- Which browser (FireFox, opera, Internet explorer) and which type of internet connection (broadband dsl, dialup) are they using
The following posts may solve some of your problems.