Complex sentence: Originally founded as a search engine for digital music, audio books, ringtones and other media online, it operated as GoFish until 2009 then the service rebranded as the advertising network BetaWave in 2009 after a failed attempt at changing their niche into children's media.
Split into simpler sentences: Originally founded as a search engine for digital music, audio books, ringtones and other media online, it operated as GoFish until 2009. The service rebranded as the advertising network BetaWave in 2009 after a failed attempt at changing their niche into children's media.