How in GA to "remember" users who visited a category on the site?

Question

Google Analytics

To evaluate the effectiveness of an offline event, we want to track how the users who were at the event behave.
To do this, we create a separate page on the website with the program of the event and presentations that can be downloaded. It is assumed that everyone who will be at the event will visit the page.
How to "remember" users who visited a page with a certain URL in Google Analytics? Well, that is, I visited the page once, after a month / six months / a year I went to the site and performed the targeted action.
Well, that is, I want to put those who visited the section once and for all into a separate view. How to set up filters

Answer 1

You can use user variables that you will assign to the user at the moment when he visits a particular page.
To do this, you will need to add a line to the code on the site. And set tracking in the counter parameters.
https://support.google.com/analytics/answer/270982... (section "Access area "User").
Only they will still be stored not forever, but for the duration of the cookie on the user's computer.