Optical Character Recognition (OCR) is a technology that allows the conversion of different types of documents, such as scanned paper documents, PDF files, or images captured by a digital camera, into editable and searchable data. When it comes to performing OCR on PDF files using Python, there are several libraries and tools available that can help. One popular approach is to use Tesseract, an open-source OCR engine, along with a PDF processing library like PyMuPDF or pdf2image.