What is the best practice for using Concept Obs Groups in forms

What is the recommended best practice for using Concept obs groups in forms and for grouping concepts? When should they not be used?

Are these of any help? https://wiki.openmrs.org/display/docs/Obs+Group https://wiki.openmrs.org/display/docs/Value+Group+-+Handling+Observations+With+Multiple+Answers https://wiki.openmrs.org/display/docs/Managing+Concept+Sets

Thanks @dkayiwa will look into these

Could you please share the sample? To collect tabular form data we should use Obs Groups in HTML Forms but I did not find any example to understand.

Here are the paper examples and how can i make an HTML form for these paper forms?