I need to create a macro that:

For all cells in a column, find the cells with similar values in
another column (whereas all cells are different in the first column,
there can be several identical cells in the second one) and paste the
cells next to them in a third column (this I know how to do!).

I am a beginner using VBA, and quite helpless on this issue! Thanks in
advance for your help!
Franck