Sessions
Imagine your website as a digital store. Every time someone visits your store, a "session" begins.
During this "shopping trip," the visitor explores different departments, looks at products, and perhaps adds something to their cart. The session continues as long as the visitor is active in the store. If they enter the store, browse around, and then leave, the session ends
So, if multiple people visit your store in a day, each visit is counted as a unique session. Web analytics helps you understand how long visitors stay in the store, which departments they visit the most, and whether they actually make a purchase.