Daily Unique Visitors contains all the visitors from all sources:
Organic search traffic - visitors who find the website with using a search Engine like Google.
Paid traffic – visitors who visit the website with clicking an advertisement.
Referral traffic – visitors who visit the website after clicking the links on another websites.
Direct traffic – visitors who visit the website directly without searching, clicking an advertisement or link from another website.
Number of Daily Unique Visitors: Estimated daily unique visitors count from all sources. Total number of unique unduplicated (counted only once) visitors each day.
Daily Pageviews: Estimated total Daily Pageview count. The daily page views are the estimated number of pageviews per one visitor on a website and refers to how many times someone viewed a page on your website in a day.
Avg. Time On Site: Average time on website is the amount of time (in minutes and seconds) visitors have spent on the website.