If you took the PSAT in October, you'll receive the results, or score report, in December or January.
Your results will not have an impact on college admissions or scholarships (unless your score is high enough to qualify you for a National Merit Scholarship).
The PSAT is practice for the SAT, which will be very important for college admissions and scholarships. You should use your PSAT score report to identify your weaknesses, so you know what to work on as you prepare for the SAT.
Each year, a (very) limited number of juniors qualify for National Merit Scholarships based on their PSAT scores.
If you do qualify, you'll be notified by the National Merit Scholarship Corporation in September of your senior year. Talk to your counselor if you have questions about the process.