Code explantion with map

Question

Can somebody explain this code in super detail pls
https://code.sololearn.com/cuH5Uw895NoR/?ref=app

Answer 1

https://en.cppreference.com/w/cpp/container/map
map<string, string> db; //declares a new map with string keys and string values
db["foo"] = "bar"; //stores "bar" in db with key "foo"
db.find("foo") //returns iterator to element with key equal to "foo", or end() iterator if it doesn't exist