PBI Column Based Unstructured Data Grouping

Hi pbin9_9 ,

According to your description, here are my steps you can follow as a solution.

(1) My test data is the same as yours.

(2)Click "Transform Data" to go to the Power Query editor, add index columns, click Apply and close.

(3) We can create a table.

Table 2 = var a=ADDCOLUMNS('Table',"groups",LOOKUPVALUE('Table'[Data],'Table'[Index],MAXX(FILTER('Table',[Index]<EARLIER('Table'[Index])&&CONTAINSSTRING([Data],"Group")),[Index])))
var b=ADDCOLUMNS(a,"Combine",IF(CONTAINSSTRING([Data],"Group"),BLANK(),[groups]&":"&[Data]))
return SUMMARIZE(FILTER(b,[Combine]<>BLANK()),[Combine])

 (4) Then the result is as follows.

Best Regards,

Neeko Tang

If this post  helps, then please consider Accept it as the solution  to help the other members find it more quickly.