Form in html. Explain everything, plz

Question

I had a lesson about form. I understood a few things, that it sends information about you. How is it! How and where we can use it, meaning of this form plz, explain

Answer 1

Here's a good place to start: https://www.sololearn.com/learn/HTML/1035/

Answer 2

Visit these:
https://www.w3schools.com/html/html_forms.asp

https://www.google.com/amp/s/www.geeksforgeeks.org/html-design-form/amp/