Google Maps API How to add a marker with your description?

Question

Google Maps

You need to write an application that adds a marker and an info box with text from a form to a map. The form consists of an input (with auto-substitution) and a textarea. That is, we enter the address in the input, add a signature to the textarea, after which a marker is placed on the map and a window next to it, in which there are entries from the textarea. Form example: