Aperol
Aperol is a bitter aperitivo made by Davide Campari-Milano of Italy at 11% ABV, used in 2 drinks on this site.

Public domain · Cropped, white-balanced, graded and re-encoded to WebP by eXir.
A bottle of Aperol with its orange and black label
Composition
Producer published figures · camparigroup.info Aperol consumer information. The producer's own consumer-information page states 11% alc./vol. and, per 1.5 fl oz serving, 74 calories and 11.6 g of carbohydrate; those are restated here per 100 ml (44.36 ml to the 1.5 fl oz). Carbohydrate is taken as sugar because the product carries no other kind. Cross-checked against the site's own energy arithmetic: 11% alcohol plus 26.2 g of sugar comes to about 165 kcal against the 167 restated here, a match close enough to be credible, unlike the Open Food Facts branded records for this product, which disagree with themselves and with each other on both strength (11%, 12.5% and 15% across listings) and calories, and are not used.
Used in these drinks
most firstSubstitutes
Campari: Higher in strength and considerably more bitter and less sweet, so a drink built on it comes out shorter, drier and much more assertive. Closer to a different drink than to a substitution.
A general substitute is a browsing aid rather than a drink-specific claim. Where a particular drink has a substitution worth making, it says so on its own page and recomputes the spec for it.