What is a common characteristic of online music retailers?

The characteristic of online music retailers that stands out is the availability of music for digital download. This feature allows customers to purchase and instantly acquire music files without the need for physical media. The digital format caters to the convenience of modern consumers who prefer immediate access to music and can enjoy it on various digital devices, such as smartphones and computers.

In contrast, physical store locations imply a traditional retail approach that is not typical for online retailers. Specializing in live performances focuses on a different aspect of the music industry and would not align with the primary function of an online music store. Additionally, concentrating solely on physical album sales limits the scope of sales that online retailers can offer, as the digital landscape has significantly shifted towards downloadable content. Overall, the focus on digital downloads aligns with current consumer behaviors and the evolving nature of music distribution.