The phrase refers to digital versions of instructional materials for the guitar, available at no cost, and accessible in a portable document format. These resources provide instruction on various guitar-related topics, such as chord diagrams, scales, music theory, and song arrangements, readily downloadable for personal use. For example, a beginner might seek a free PDF outlining basic guitar chords and strumming patterns.
The availability of these resources significantly lowers the barrier to entry for aspiring guitarists, enabling self-directed learning at their own pace and convenience. Historically, guitar education relied heavily on physical books purchased from music stores. The advent of free digital resources has democratized access to learning, empowering individuals globally to pursue their musical interests regardless of their geographical location or financial constraints.