How to fix wobbly table/improve stability

desktable

i want to fix my table so it doesn't wobbly sideway. it's a little annoying because when i move sligthly my monitor goes shaky because of the wobbly. i try to use using this "white thing" and it help to stabilize but, still need improvement.
thank you and if you have solution please give the picture to for example.

english is not my native languange sorry if there are mispelled word.

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Best Answer

You want your table to be more rigid. Triangles make things rigid. The white things you added are shelf brackets and they're basically small triangles. Larger more triangular triangles will have a better effect. There may also be existing fasteners on the table you can tighten