A Romelu Lukaku brace inspired Everton to a 3-1 second leg victory at Goodison Park.
Lukaku cancelled out Sekou Sanogo's 13th-minute opener before fellow Belgium international Kevin Mirallas sealed a 7-2 aggregate success against the Swiss club.
"It was an interesting game to see how we could cope with playing in a second leg," he explained. "We had such a good lead and sometimes that can affect the way you want to perform.
"We knew Young Boys had a fantastic result against FC Basel in their domestic league and I admire their team because they are an attacking side who want to get on the ball.
"We made it an open game. I was very satisfied with the way we scored three goals and created a number of good opportunities.
"To be the last British team left in the Europa League is a very satisfying achievement and we have been very, very pleased with the way we have played both games in this particular tie."
