Folks over at Scrub Wiki have discovered a recently-filed Sony Interactive Entertainment patent, which describes a feature that allows players to leave in-game text and audio clips for other players.
The idea behind the feature is to take community participation to a new level, encouraging players to communicate with each other and offer tips. An illustration included in the September 2020 United States Patent and Trademark Office filing shows a screenshot of Killzone with helpful tips left behind by players.

PB = PB || {};
PB.gptStandAlone = PB.gptStandAlone || {};
PB.gptAutoRefresh = PB.gptAutoRefresh || {'gptAds':[], 'gptStandAlone':[]};
admiralCookie = null;
if (typeof readAdmiralCookie === "function"){ admiralCookie = readAdmiralCookie();
}

googletag.cmd.push(function() {
var standAloneSizeMapping = googletag.sizeMapping().addSize([0, 0], []).addSize([750, 0], [[300, 250]]).addSize([980, 0], [[300, 250]]).build(); PB.gptStandAlone['ros_300x250_p_slot4_1610636640'] = googletag.defineSlot('/4403/cr/playstationlifestyle/ros', [[300, 250]], 'ros_300x250_p_slot4_1610636640')
.defineSizeMapping(standAloneSizeMapping) .addService(googletag.pubads())
.setTargeting('pos', 'P').setTargeting('content_detail', '0').setTargeting('kw', 'in-article').setTargeting('coppa', '0').setTargeting('site', 'playstationlifestyle');
googletag.enableServices();
...