It depends on the specific likert scale, but generally it is the ordinal level
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It is an ordinal scale.
Technically is an ordinal level measurement - because the options imply a hierarchy (i.e low to high levels of your variable of interest), but we cannot say that the difference between each level is precisely the same as you would be able to with an interval measurement. There is some controversy over this though, and it is still often used like an interval measurement in statistical tests, although this might not really be appropriate.
Ratio scale
nominal
This is the lowest level of measurement. It is basically used for identification.