This is the 187th most frequent Russian word.
помощью
"Помощью" means "with the help of" or "by means of" in English.
'при помощи' signifies the tools or resources (modern technologies) employed to conduct the conference.
Конференция прошла при помощи современных технологий.
The conference was held with the utilization of modern technologies.
'благодаря помощи' conveys gratitude and influence of the assistance provided by the volunteers in achieving the goal.
Мы достигли цели благодаря помощи волонтёров.
We achieved the goal thanks to the help of volunteers.
'с помощью' here indicates the means or assistance used, specifically the friend, to solve the problem.