According to the Daily Mirror's political editor, Pippa Crerar
In essence, the indicate votes amendment will take the same form as the Cooper-Letwin amendment where there will be a vote to legislate for indicative votes to take place next week. It is basically to force parliament to commit to a series of Brexit options such as a second referendum or a softer Brexit deal.
Considering that this is a cross-party amendment, it may just gather enough support to pass later. It could be close. Something to watch out for.