What multistage adaptive means
The digital SAT uses multistage adaptive testing. Every student sees the same kind of Module 1, a mix of easy, medium, and hard questions. When that module ends, the app evaluates your performance and hands you one of two versions of Module 2: a lower difficulty version or a higher difficulty version.
This is different from question level adaptive tests, where each question you answer changes the next one. On the SAT, questions inside a module are fixed. You can skip around, flag, and come back freely within a module without affecting anything.
Routing happens independently for each section. Doing well on Reading and Writing Module 1 has no effect on which Math Module 2 you get.
Line ℓ is shown in the xy-plane. What is the slope of line ℓ?
Why Module 1 matters more
Module 1 is 27 of 54 Reading and Writing questions or 22 of 44 Math questions, but its influence is larger than that share, because it determines which Module 2 you see and therefore what your score ceiling is.
Routing into the easier Module 2 effectively caps the section score, since the questions there do not carry enough difficulty information to place you at the top of the scale. Routing into the harder one means the ceiling is open, and it also means missing a few questions costs you less than it would on the easier module.
So the practical advice is simple: give Module 1 everything. Do not save energy for later, and do not treat the first module as a warm up.
It does not mean you should answer slowly and carefully to get an easier Module 2.
What adaptivity does not mean
It does not mean you should answer slowly and carefully to get an easier Module 2. Routing down is not a strategy, it is a lower score.
It does not mean the first few questions matter more than the rest of Module 1. The whole module is evaluated, not a running tally as you go.
It does not mean the harder Module 2 is a punishment. Getting the harder module is the outcome you want. If Module 2 feels noticeably tougher than Module 1, that is a good sign, not a bad one.
How it changes your pacing
Since Module 1 sets your ceiling, do not leave questions unanswered there. You have 32 minutes for 27 Reading and Writing questions, about 71 seconds each, and 35 minutes for 22 Math questions, about 95 seconds each. If a question is going nowhere after about twice that, guess, flag it, and move on.
In Module 2, the same pacing applies, but the stakes are different depending on which version you got. On the harder version, accept that some questions are meant to be hard, bank the ones you can do, and spend leftover time on the flagged ones.
How it changes your practice
Practice under the real module structure, not as one long untimed block. The experience of a hard second module right after a demanding first one is the thing you are training for.
Since there is no penalty for wrong answers, never leave anything blank in either module. A blank and a wrong answer score the same, and a guess has a real chance of being right.