What does foo and bar mean

Question

When I typed in Spam and eggs it gave me a series of errors(I typed this in): print('Spam and eggs')

Answer 1

://The variables foo and bar are called metasyntactic variables, meaning that they are used as placeholder names in example code to demonstrate something.
//Intresting fact Na😂
://"spam" and "eggs" are used as placeholder variables in Python, other languages use foo and bar

Answer 2

https://www.sololearn.com/discuss/742208/?ref=app
https://www.sololearn.com/discuss/90151/?ref=app