A lab report is a document that describes the process, procedures and results of an experiment or scientific investigation. It typically includes a description of the purpose of the experiment, the materials used, the procedure followed to conduct the experiment, the data collected during the experiment, and the analysis and interpretation of the results. The goal of a lab report is to provide a detailed account of what was done in the laboratory, so that others can understand the process and replicate it if necessary. It also serves as evidence of the work carried out, which may be used for grading or evaluation purposes.