What are eggs in Pokemon Go?

[iMore Question]

I don't understand the eggs in Pokemon Go. What are they and what do they do?

 

[Vinu Jacob]

Eggs can be incubated and hatched into pokemon once you put them in the incubator and walk the requisite km required by the specific egg.

 

[taeisme]

Also, there are lucky eggs that you can use that gives you bonus XP.