The part of speech called an adverb usually tells when, where , or how something is done.
Adverbs used to tell when:
Twenty tailgaters filled the driveway yesterday.
We hope the bus will come soon.
Adverbs used to tell where:
We used to live there.
After dinner, let’s go outside.
Adverbs used to tell how:
Maria Tallchief sings well.
The technician expertly installed the software.
Most adverbs of manner (the ones that tell how) end in -ly.