2 possible ways:
1. via GUI
2. via CLI (simply created it and deleted in a lab)
ontap93a::> vol snapshot create -vserver test_serg -volume data_serg -snapshot "tier 0"
ontap93a::> vol snapshot show -vserver test_serg -volume data_serg
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
test_serg
data_serg
weekly.2018-12-30_0015 1.37MB 0% 48%
weekly.2019-01-06_0015 1.28MB 0% 46%
daily.2019-01-07_0010 1.21MB 0% 45%
daily.2019-01-08_0010 116KB 0% 7%
hourly.2019-01-08_0505 100KB 0% 6%
hourly.2019-01-08_0605 100KB 0% 6%
hourly.2019-01-08_0705 100KB 0% 6%
hourly.2019-01-08_0805 100KB 0% 6%
hourly.2019-01-08_0905 100KB 0% 6%
hourly.2019-01-08_1005 96KB 0% 6%
tier 0 372KB 0% 20%
11 entries were displayed.
ontap93a::> vol snapshot delete -vserver test_serg -volume data_serg -snapshot "tier 0"
Warning: Deleting a Snapshot copy permanently removes any data that is stored only in that Snapshot copy. Are you sure you want to delete Snapshot copy "tier 0" for volume "data_serg" in Vserver "test_serg" ?
{y|n}: y
ontap93a::> vol snapshot show -vserver test_serg -volume data_serg
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
test_serg
data_serg
weekly.2018-12-30_0015 1.37MB 0% 60%
weekly.2019-01-06_0015 1.28MB 0% 58%
daily.2019-01-07_0010 1.21MB 0% 57%
daily.2019-01-08_0010 116KB 0% 11%
hourly.2019-01-08_0505 100KB 0% 10%
hourly.2019-01-08_0605 100KB 0% 10%
hourly.2019-01-08_0705 100KB 0% 10%
hourly.2019-01-08_0805 100KB 0% 10%
hourly.2019-01-08_0905 100KB 0% 10%
hourly.2019-01-08_1005 1.21MB 0% 57%
10 entries were displayed.