Simulate a 6LoWPAN mesh with Cooja (Please explain in detail)

When you simulate a 6LoWPAN mesh with Cooja in Contiki OS what does the simulation demonstrate exactly?

Can someone also explain the significance of the neighbors and the routes in the browser output provided below?

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Browser address: [aaaa::212:7401:1:101]

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Neighbors

fe80::212:7404:4:404

fe80::212:7402:2:202

Routes

aaaa ::212:7403:3:303/128 (via fe80::212:7404:4:404)16711080s

aaaa ::212:7404:4:404/128 (via fe80::212:7404:4:404)16711276s

aaaa ::212:7402:2:202/128 (via fe80::212:7402:2:202)16711275s