The digitalage,withitsrisinge-commerce,hastransformedthewayconsumersandbusinesses
interact. Whileonlineshoppingoffersconvenienceandspeed,ithasalsocreatedaphysical
barrier betweenconsumersandbusinesses.Thishasledtoagrowingneedforeffectivedigital
communication methods.Onlinereviewshavebecomeanessentialtoolinthisprocess,acting
as afeedbackbridgebetweenconsumersandbusinesses.Theopinionssharedonlinecarry
considerable weight,directlyinfluencingthepurchasedecisionsofotherconsumers.Moreover,
these commentsprovidevaluableinsightsforbusinessestoimprovetheirproductsandservices.
Tomitigatethisdistancing,e-commerceplatformsencouragethesharingofopinionsandfeelings
of usersaboutproducts,whichsignificantlyimpactsthepurchasingdecisionsofotherconsumers
and providesvaluablefeedbackforbusinesses.Facedwiththevastquantityandvarietyof
comments, thechallengeofanalyzingthemefficientlyarises.TheBERTimbaumodelemerges
as asolution,offeringautomatedsentimentanalysisinBrazilianPortuguese.Experimental
results demonstratetheeffectivenessofthemodel,withaccuraciesrangingbetween75%to88%
depending onthecategorizationofsentimentsandtreatmentof3-starreviews.
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