Which code should I use to inform me of updates on websites?

I don't know if this is the correct place to ask this question but I'll ask it here anyway.

I don't know much about programming (I only ever learned MATLAB!) but I wonder if there is a simple way to write a code to check a website every x minutes, say, to see if a certain thing changes and notify me when it does?

I hope this question is not too vague!

Thanks in advance for your help.

EDIT: I have computer running Windows and one running Ubuntu.