Theory:

So, if inside your ‘Inbox,’
My Grandma you should see,
Please ‘Copy,’ ‘Scan’ and ‘Paste’ her
In an email back to me.
image87.jpg
 
Explanation:
 
Now, the poet wants us to see inside our mail inboxes and says if we can see her then to copy his grandmother, scan it and paste as we do to other papers and send an email back to him. This entire poem is just for fun, and he is playing on words, mostly for a comic reception.
Reference:
State Council of Educational Research and Training (2019). Term-1 English Standard-7. The computer swallowed grandma - Anonymous (pp. 16-17). Published by the Tamil Nadu Textbook and Educational Services Corporation.