Visits/Sessions :
Count of the total number of times your website/app/property was accessed..

Visitors :
Total number of visitors to your website/app/property

*Visits vs. Visitors :
Google Analytics and NetON Analytics measures both visits and visitors in your account. Visits represent the number of individual sessions initiated by all the visitors to your site. If a user is inactive on your site for 30 minutes or more, any future activity is attributed to a new session. Users that leave your site and return within 30 minutes are counted as part of the original session. The initial session by a user during any given date range is considered to be an additional visit and an additional visitor. Any future sessions from the same user during the selected time period are counted as additional visits, but not as additional visitors.

Avg. Visit Duration / Average Visit Duration:
The average duration visitor sessions represented in total seconds.

Avg. Time on Page Duration / Average Time on Page Duration:
The average amount of time visitors spent viewing this page or a set of pages.

Percent New Visits :
The percentage of visits by people who had never visited your property before.

% New Visits:
The number of visitors whose visit to your property was marked as a first-time visit.

Bounce:
If a visitor visits only one page on your site and then leaves your website/app/propery its called a bounce.

Visit Bounce Rate:
The percentage of single-page visits (i.e., visits in which the person left your property from the first page).

Pages / visit:
The average number of pages viewed during a visit to your property. Repeated views of a single page are counted.

Total Page views:
The total number of page views for your property.

Unique Pageviews :
The number of different (unique) pages within a session. This takes into both the pagePath and pageTitle to determine uniqueness.

*Pageviews vs. Unique Pageviews :
A pageview is defined as a view of a page on your site that is being tracked by the Analytics tracking code. If a visitor clicks reload after reaching the page, this is counted as an additional pageview. If a user navigates to a different page and then returns to the original page, a second pageview is recorded as well.
A unique pageview, as seen in the Content Overview report, aggregates pageviews that are generated by the same user during the same session. A unique pageview represents the number of sessions during which that page was viewed one or more times.

Mobile Device:
The branding, model, and marketing name used to identify the mobile device.

Mobile Type:
The type of device: desktop, tablet, or mobile..

Source :
The source of referrals to your property. When using manual campaign tracking, the value of the utm_source campaign tracking parameter. When using AdWords autotagging, the value is google. Otherwise the domain of the source referring the visitor to your property (e.g. document.referrer). The value may also contain a port address. If the visitor arrived without a referrer, the value is (direct).

Type source :
The type of referrals to your property. When using manual campaign tracking, the value of the utm_medium campaign tracking parameter. When using AdWords autotagging, the value is ppc. If the user comes from a search engine detected by Google Analytics, the value is organic. If the referrer is not a search engine, the value is referral. If the visitor came directly to the property, and document.referrer is empty, the value is (none).

Social Network :
Name of the social network. This can be related to the referring social network for traffic sources, or to the social network for social data hub activities. E.g. Google+, Blogger, etc.

Social Network Action :
For social interactions, a value representing the concatenation of the social network being tracked (e.g. Google, Facebook, Twitter, LinkedIn) and the social action being tracked at this hit level (e.g. Google: +1, bookmark)

Social Interactions :
The total number of social interactions on your property.

Page Title :
A value representing the Page Title (with/without URL).