First, log into your conference site using your personal username and password. (https://yoursitenamehere.zerista.com in most cases) This will load the homepage of the "Front-end" of the website by default.
To load admin page, just put /admin at the end of your normal front-end url. This will then transfer you into the admin side of the website.
Once you're logged into admin, you may need to switch back into the front end quickly. Instead of having to alter the web url again, choose the name of the event with the underlined title at the top left hand of the webpage. As seen below.
As a moderator of your site you can also login to the front-end of the website. Learn more about how to do this here!