An invitation is a request or formal announcement asking someone to attend or participate in an event, gathering, or occasion. It typically includes essential details like the purpose of the event (such as a party, wedding, or meeting), the date, time, location, and any other relevant information (like dress code, RSVP instructions, etc.). Invitations can be physical (such as cards or printed materials) or digital (like emails, messages, or event pages).

For example:

• A wedding invitation invites guests to celebrate the marriage of a couple.
• A birthday invitation invites people to celebrate someone’s birthday.

Invitations can vary in tone and style depending on the event — they can be formal, casual, themed, or creative, reflecting the nature of the occasion and the hosts’ preferences.