-2004 Bush/2012 Romney voters. Conservative-leaning Miami residents who voted for Clinton in 2016 more out of a dislike for Trump that year and were otherwise open to conservative candidates. Mostly Cuban.
-Low propensity voters. Working-class or low income voters who rarely turned out in previous elections or were not registered to vote before 2020. Mostly not very political and generally low-trust, low-info voters. May have been encouraged to vote this year by Trump's stimulus payments, his "macho" personality, opposition to lockdowns etc. A heterogeneous group, comprising most Latino groups as well as whites and potentially even some blacks (newly registered blacks probably more likely to vote Republican than those who were registered prior to 2020).
-Newly eligible voters. People who became US citizens in the past few years, especially Venezuelan or other Latin American immigrants who have vivid memories of Chavez/Maduro's Venezuela and voted in opposition to "socialism".
Spanish language ads went on about Cuba and Venezuela.