What is a GRE exam? Is it similar to the SATs?

Not really. SATs majorly is for college admission and mostly language-based sometimes while GRE is a more advanced exam that cut across various subjects, and it is more difficult than SATs. For example, there are about 30,000 English words in the GRE curriculum and you are expected to know at least the meaning of 4000 of these words. The maths is also technical and deep, in addition to other subjects..

It's the most commonly required admission test for grad school. Much like the SAT and ACT, the GRE exam is a broad assessment of your critical thinking, analytical writing, verbal reasoning, and quantitative reasoning skills — all skills developed over the course of many years.

The Graduate Record Examination (GRE) is a standardized test that is an admissions requirement for most Graduate Schools in the United States.[7] Created and administered by the Educational Testing Service (ETS) in 1949,[8] the exam aims to measure verbal reasoning, quantitative reasoning, analytical writing, and critical thinking skills that have been acquired over a long period of learning and that are not entirely based on any specific field of study outside of the GRE itself. The GRE General Test is offered as a computer-based exam administered at Prometric testing centers.

In the graduate school admissions process, the level of emphasis that is placed upon GRE scores varies widely between schools and between departments within schools. The importance of a GRE score can range from being a mere admission formality to an important selection factor.

You can learn more about it by checking the below mentioned link:
https://en.wikipedia.org/wiki/Graduate_Record_Examinations

The GRE is an exam similar to the SAT. It tests your critical thinking skills, reading comprehension, etc. It is usually required for those trying to get accepted into a graduate program. There are materialso available to help you study for it as well, like the SAT.

You will need to focus on stress and time management. In order to manage stress you have to manage your time wisely. <span style="background-color: transparent;">You have to set a routine for yourself and stick to it for the most part. Once you get into the groove of a routine it will be much easier for you to manage your time and have enough time for everything you need to do (including relaxing). Make yourself to-do lists on a weekly basis, use Google calendar or a planner to keep track of events, deadlines, and due dates. In addition to setting a routine and sticking to it, plan out relaxing activities into your day. Or set aside a time, after everything is done for the day, that you can have "me" time. I have also personally found it essential to not only find time for myself but also make use of that time in a way that is best for me and my holistic wellness. I have found the HeadSpace app to be an essential tool in helping me relax and generally feel more relaxed throughout the day, Guided meditation, even if you have a busy schedule, will make you feel more at ease and relaxed throughout the day as a whole (not just when you have the time to relax and focus on that "me" time).</span>

<span style="background-color: transparent;">Set a routine.Use Google Calendar.Set aside Me TimeWrite weekly to-do lists and use a planner.Find a peaceful and restful activity that will help you feel relaxed.</span>

<span style="background-color: transparent;">Here is how to be successful in them:</span>

1. <span style="background-color: transparent;">Stay on track - do assignments early, finish things a head of time, and be aware of all of your deadlines</span>
2. <span style="background-color: transparent;">do all the the assignments and read all of the coursework required- do not cut corners</span>
3. <span style="background-color: transparent;">use Google calendar to keep track of deadlines</span>
4. <span style="background-color: transparent;">communicate with your professor early if something comes up</span>
5. <span style="background-color: transparent;">do not be afraid to ask for an extension if you need one</span>
6. <span style="background-color: transparent;">study, and study a lot! you don't have regular class sessions so you will need to put in more work at home.</span>
7. <span style="background-color: transparent;">Do your best and genuinely try hard to give it your all.</span>

The best way to score high on the test is to Google search an online program or book that will help you study. Once you find an online lesson plan for success you can use it as a road map for studying. Otherwise, find a book to help you study and spend 45 mins a night reading through it and studying. Depending on when you test is, the first thing you will want to do is organize a studying schedule for yourself. Target studying certain sections of the test and divide them up by the weeks/months you have until you have to take it.

Not at all. They serve different functions: the SAT is a standardized entrance exam for undergraduate studies, while the GRE is a standardized entrace exam for graduate studies. The SAT is organized by the College Board, while the GRE is given by ETS.