Spend at Lidl and scan your Lidl Plus app. For each €10 you spend you get one stamp. You can get a maximum of 3 stamps per shop.
The stamps will show in the Lidl Plus app. Once you've 3 you can submit to enter the draw.
You can enter more than once per week e.g. if you did 2 separate small shops of €30 each, that would give you 2 entries.
Each store will have a draw each Thursday. The winner can get €200 of Lidl vouchers. Winners will be notified via the app but they have to answer a question of skill (presumably it's an easy question) to secure the vouchers.
Weekly winners need to claim the vouchers within 7 days.