Your ticket is a web page, and its link is in the email you were sent. There is no app to install and no account to sign in to.
What is on the page
A QR code, the event details, and — if the venue has an address — a map and a directions link.
Under the QR are your name, the ticket type, and a ticket code that looks like EF-XXXXXX-01.
Your confirmation email carries the same Get directions link next to the venue, whenever the venue has one to give — so you can open turn-by-turn directions straight from your inbox, on a phone, without loading the ticket page first. An online event, or a venue with nothing locatable at all, simply has no directions line in the email — there is nowhere for it to point.
The name, date and code are printed into the QR image itself, not just placed next to it. So a screenshot of the QR still identifies which event and which person it belongs to, which a bare square would not.
Keeping it
The link is the ticket — keep it private
Anyone who has the link can show the QR. There is no password on it, because there is no account either. Do not post it publicly, and if you are sending it to someone, send it to one person.
At the door
Show the QR. It admits one person, once — the second scan of the same code is refused and shows when and by whom it was first used. That is what makes a forwarded screenshot harmless to you: the person who arrives first gets in.
If the camera will not focus, read out the ticket code — staff can enter it by hand.
Banners on the page
If you cannot find the link
Contact the organizer — their support email is at the bottom of the ticket page, and it is also in the confirmation you were sent. They can resend it. We cannot look up a ticket for you: there is no account to look it up against, which is also why nobody can take your ticket by guessing.
Cannot make it? Passing your ticket on about passing your ticket on.