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Most of the SSD comes with an overprovisioning feature which takes care of speed and optimization.
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The later life span depends on how many times they re-written, hence lower the better.
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I would highly recommend you to perform it weekly for HDD, and monthly for SSD. Here you can choose to defragment your disks on a daily, weekly or monthly basis, or if you have an old system, which is slow one and lacks in resources, you can remove the scheduled defragmentation option (uncheck the ‘Run on a Schedule’ option), and defragment it manually whenever you are not working on your computer. You also have the Optimize drive button right upfront if you want to do that instantly. Make sure to choose the Optimize drives option.Click on the Choose button to select drives.Increase task priority if three consecutive scheduled runs are missed.Click on Change Settings button, and here you can choose.
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