Adware, often called advertising-supported software by its developers, is software that generates revenue for its developer by automatically generating online advertisements in the user interface of the software or on a screen presented to the user during the installation process. Wikipedia

Software that automatically adds unwanted advertisements to a user interface Wikidata

Any software package which automatically renders advertisements in order to generate revenue for its author. OmegaWiki

A software application that includes advertisements, which are displayed while the software is running. Developers use adware as a source of income and to keep the costs of the software down (usually making it free). Some adware programs can include spyware. Wiktionary

Software application. Wiktionary (translation)