I understand how to use grep in the simple form:

<command that spits out text> | grep "text to find"

I would like to be able to grep multiple different bits of text all at once.
How do I do that? Is grep the correct command to do this?

Example

I run arp-scan and I get a list of devices and their mac addresses. I want to search for the presence of multiple unique mac address strings. If I only wanted 1 mac address, I would use grep like this:

arp-scan --localnet --interface=<my interface> | grep "mac address"

I have heard of sed, but I don't know if it fits my use case.