What you should wear really depends on where you’ll be working.
In Office & Retail jobs it's important to maintain an elegant appearance, e.g. white/dark shirt or blouse, dark trousers and dark closed shoes
If you’ll be working in a warehouse or at a production facility, safety shoes and protective clothing are often required along with clothing designed for warehousing work. You usually have to obtain these yourself.
Please make sure you read the instructions in the app and emails sent by your recruiting partner.