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user engagement metrics evaluation information retrieval aggregated search dwell time search measurement absence time inter-session metrics intra-session metrics native advertising advertising quality recommender system mobile advertising online news serendipity relevance online multi-tasking focus attention saliency online metrics open mindset focus mindset music a/b testing attention models feature engineering ad quality positive affect post-click experience web analytics search experience mouse tracking relevance assessment reliability metric entity search social media voice thinking about diversity spotify research acting on segmentation user intents optimizing for the right metric reinforcement learning reward functions understanding intents involvement interaction diversity hyperlinking online multitasking switching between sites teleporting backpaging contribution metadata entity networks interesting- ness information access automatic linking endurability aesthetics. news observational study causal inference prediction yahoo optimization across sessions within sessions big data crowdsourcing validity subjectivity setting objectivity temporality scale web search downstream engagement click counterfactuals web traffic networks of sites news bias framing experimenations intuitiveness discriminative power network of sites clicks network effect networked user engagement models of user engagement beyond relevance beyond session interactive ir online-multi-tasking towards engagement complex information spaces engagement metrics xml retrieval recommender systems evaluation (basic) personalisation algorithms indexing (basic) human in the loop subjective metrics emotion research at spotify sentiment interesting user generated content reading user study online learning vertical selection multi-armed bandits questionnaire eye tracking making personalization transparent self-reporting physiological measurement user interest gaze news domain user-generated content crowd-sourcing comments sentimentality interpretaions hcomp 2020 taxonomy of online metrics map document trec query ncdg recall precision test collection short clicks feature anaysis html features ground truth editorial mobile frienliness conversions aesthetic appeal visual features reputation algorithms user perception trust sources pull vs push bandit algorithm organize listening lean-back lean-in prefix query genre mood searching for fun satisfaction effort success push pull mindset intent online offline personalization artists diversity experimentation and evaluation of metrics modelling user intents mobile advertis- ing survival analysis framework user satisfaction viewport time news reading playlist long-term-value abscence time in-the-moment metric small- and large-scale measurement intra-session and inter-session messures beyond relevance and clicks. retrieval effecttivemess dwell time prediction native advertising; advertising quality pull paradigm push paradigm entity versus search query features spark exploratory search user features optimisation for metrics expectaion predictive models online advertising large scale analytucs euro 2016 mobile analytics new year day brexit patterns app usage hyperlink reading behaviour storytelling ad offensive rate ad copy features pre-click experience ad preference offensive rate playlist type user type co-clustering pre-click