It seeks to help the public separate fact from fiction in public pronouncements about the numbers that shape our world, with a special emphasis on pronouncements about public finances that shape government’s delivery of so-called ‘Sustainable Development Goals’ or SDG public services, such as healthcare, rural development and access to water / sanitation. 
Lengo lake ni kuwasaidia wananchi kupambanua ukweli na hisia kutokana kutangazwa kwa takwimu zinazoathiri dunia yetu, uzito ukiwa kwenye matangazo yanayohusu fedha za umma zinazoathiri utekelezajiwa kile kinachoitwa "Malengo Endelevu ya Milenia" au huduma za umma za SDG, kama vile afya, maendeleo vijijini na upatikanaji wa maji.