How can I use GRE Score Select Option

GRE Scores are reported after 10-15 days of test administration. On test date, you can chose to show Recent GRE Score to recruiters Or all. Later test date, you can chose to show recent / all or any GRE Score to recruiters. The scores will be sent to selected institutions. If you want to send GRE Score to more than FOUR institutions a fee is chargeable.

GRE Scores are valid for a period of 5 years. Candidates can write GRE General 5 times in a year but there must be a gap of 21 days between two GRE tests.

Although this is my personal opinion but  I feel everyone should GRE even if need it for sending application to a Grad School or not. You can write GRE for self assessment too.

Source: www.gre.org