Answer: Model Training means feeding computer's brain to recognize input based on the what we feeded

Answer: Personalised Text Recognition Module(P_OCR: Personalised Optical character recognition) is a module to recognise text from your unique handwriting style

Answer: Text Detection Module used when you want to recognise computerised text form image

Answer: tensorflow.js is opensource API to use machine learning in the browser,
The best thing about tensorflow.js is that it processes the input on your system, so your inputs are not sent to the server
Thanks to tensorflow.js for Mainting useres Privacy

Answer: Yes, You can fork/copy the project but make sure to follow MIT Licence Guidelines. Here is the MIT Licence.