Besseres
Besseres is a form of the German adjective besser, the comparative of gut, and it is used to express that something is superior or of higher quality than a reference item. In ordinary sentences it acts as a modifier before a noun and adapts its ending to the determiner and the gender, number, and case of the noun. For neuter singular nouns, common patterns include ein besseres Auto and besseres Angebot, while with a definite article you would say das bessere Auto or das bessere Angebot. In the plural you get bessere Autos or bessere Angebote.
As a standalone noun, the word can function in nominalized phrases, typically capitalized: etwas Besseres means
Etymology and usage notes: besser derives from gut and forms the standard German comparative with the suffix
See also: German grammar, comparative forms, nominalization in German.