The main non-standard monetary policy measure in that context is the full allotment of liquidity demand by banks, at fixed, low rates, against eligible collateral. In addition, the ECB also engaged in buying government securities via its Securities Markets Programme (SMP).
The Governing Council’s aim of this programme is to restore a proper transmission process that threatened to become impaired given dysfunctional market segments, as witnessed by very high interest rate spreads on sovereign bonds (slide 9).