What is the difference between traveling and travelling?

Both can be used. Traveling is the American English way of writing, and traveling is the British English way of writing.

Traveling pronunciation: English?['tr?vl?]???American?['tr?v?l?]?

Traveling pronunciation: English?['tr? v?l?]???Me?['tr?v?l?]?

The verb prototype of both is travel

Interpretation:

v.? Travel; go somewhere; spread; move quickly; [body] walk

n.? Travel; move

Word collocation:

air travel? air travel

business travel? business trip

camel travel? camel travel

ground travel? land travel

Extended information :

The grammar of travel n.? (noun)

1. The basic meaning of travel is "walking, driving", and by extension it can refer to "travel, tourism", which refers to someone traveling to Multiple trips to various places, especially a long trip abroad. Travel generally refers to travel, and is used as an uncountable noun without the indefinite article; if it refers to a longer trip to many places, the plural form travels is commonly used.

2. Travel can refer to "travel notes, travel notes", usually in the plural form, but not modified with many or numbers.

3. Travel also means "a group of passengers".