Please can anyone tell me what is the difference between “extension of service” and “expansion of service”.><

kat2784“extension of service

That needs a context.

For example: the agents are now available from 8 am to 5 pm. We will extend the service hours to 9 pm.

Our products come with a one-year warranty. We will extend this to three years for an additional charge of $5.

kat2784“expansion of service”.

We now serve customers in the continental USA. We will expand our service to include Europe.

We repair radios and TVs, but we will expand our repair business to include mobile phones.