Users:
"Total Users is the total number of people who visited your site...
Active Users is the number of people who engaged with your site...
Returning Users is the number of people who have visited your site before...
New Users is the number of people who have never visited your site..."

Events:
Actions taken by visitors including scrolling, clicking buttons, downloading, submitting forms.
A key event is an event that measures an action that's particularly important to the success of your business.

Events:
Actions taken by visitors including scrolling, clicking buttons, downloading, submitting forms.

Landing Page:
"In Google Analytics 4 (GA4), a landing page is the first page a user sees when they visit a website, regardless of where they clicked from. This could be from a search engine result, a link in an email, or social media. Landing pages can be any page on a website, such as a homepage, product page, sign-up form, or blog post."

Organic Search:
"...unpaid listings that appear in Google Search results..."

Direct:
"When a user searches for a business or brand directly on Google..."
"...typing the URL directly into the address bar, using autofill, or entering an address manually....indicate that people are intentionally seeking out a website."

Referral:
"...visits to a website that come from sources other than Google's search engine. This includes traffic from social media, email, and other websites.."

Paid Search:
"...pay-per-click (PPC) ads, are ads that appear at the top of Google search engine results page...sponsored..."

Unassigned:
"...reference traffic sources or mediums that GA4 doesn't recognize..."

Organic Social:
"...unpaid traffic that comes from social media platforms like Facebook and Instagram..."