The answer is both :)
At MBB you're more likely to get strategy, and at the accounting firms (Deloitte, Accenture, EY) you're more likely to get IT implementation.
However, it does depend. For example, at BCG, I was part of a multi-year digitization program for a client...by its very nature this had elements of both pure strategy and implementation.
In summary, tech consulting really can be done at the high (strategic) level or low (implementation) level. Tech is more of a function/vertical than anything.