The Qweak experiment at Jefferson Laboratory made the first direct determination of the proton’s weak charge via a measurement of the parity-violating asymmetry in elastic electron-proton scattering at low four-momentum transfer. A longitudinally polarized electron beam was scattered off a liquid hydrogen target and detected in eight azimuthally symmetric fused silica detectors. The parity violation asymmetry was measured by observing the difference in rates seen in the detectors when the helicity of the electron beam was rapidly reversed. The commissioning run result was published in 2013, with a measured asymmetry of − 279 ± 35 ( stat ) ± 31 ( syst ) ppb. When combined with previous parity-violating electron scattering (PVES) data, we obtained a value for weak charge of proton, 0.064 ± 0.012, which agrees well with the prediction of Standard Model.