Language proficiency levels

Hello,

Can anyone clarify what i should expect from each of the language proficiency levels seen on profiles. I understand that level 4 advanced, and level 5 fluent speak for themselves and i should not anticipate too many communication difficulties. But what should i expect from someone who has level 1 basic, 2 elementary, or 3 intermediate language skills when im wanting to communicate with them. Any help will be greatly appreciated as i find myself compatible with many others; however, the language barrier creates issues.