Proof of play
A record and report of which content played on which screen, how many times and for how many seconds on each day.
Proof of play is the record of what the screens actually played. Saying "I sent the content" is not enough; you need to know on which screen, when and for how long it appeared.
This record matters most to venues that sell advertising space. A shopping mall can document to shops or brands how many times their campaigns were shown. In corporate use, it shows that a mandatory announcement really went out in every branch.
The signage report in MIA
MIA's signage report shows, for each piece of content, the number of plays and the total seconds per screen and per date. You can narrow the report with filters and export it as CSV. A data retention setting decides how long play logs are kept. There is also a separate report that lists the installation date of each screen. For retail use, see the malls and retail page.