Discovery Mode is a Spotify for Artists tool that promotes selected tracks to listeners likely to engage with them, in exchange for a different royalty rate on the resulting streams.
4.5.1 What it does
Tracks opted into Discovery Mode are surfaced more often in algorithmic contexts (like radio and autoplay) to listeners Spotify's systems determine are likely to engage. This is distinct from editorial playlist pitching (4.4), which involves human editorial judgment.
4.5.2 Plan availability
Spotify Discovery Mode access through Madverse is a Professional plan feature (see 1.3).
Source: MadDesk article 4.5 (4-5)