As a speaker, I encourage participants to write testimonials by offering them a bonus, typically a PDF stored on Google Drive. Since I may have different events with varied target audiences, each event will feature a different file and URL. Participants can input a code after submitting their testimonial; if the code is valid, they will be redirected to the corresponding URL for the file. This system allows for multiple codes, accommodating various events with different files.

Thanks for the input, Bernie. Could you elaborate about the code input function & download offer?