It depends on how much you write data to the SSD. That's how the manufacturers rate them internally and on warranty stipulations. There was a user here who was going to use one to download 300 GB daily from torrents, and that might not be the best use of one.
That being said , and before people read that first paragraph and proceed to type their response to argue:
http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead
Most last well beyond the manufacturer's rating. You will likely replace it for the greatest, latest well before it actually dies. They endure a lot of data written just fine for 99.9% of users. I own a 840 EVO, 850 EVO, Sandisk Ultra II, Sandisk x300, Crucial MX100, and a old Kingston. I do moderate editing, and all drives are fine and all show healthy.
For example, the 850 EVO 500 GB drive has a warranty of 5 years and/or 150 TB written. Most will exceed those writes before it has issues. The 1 TB version is rated for 300 TBW.