See which talks have been submitted, and help to decide which make it to the conference:

The voting on which talks should make it to Meeting C++ 2019 has begun

by Jens Weller

From the article:

With today, you can start to vote on all 120 submitted talks for Meeting C++ 2019!

With 120 talks submitted by 82 speakers, there is a lot to vote on. You don't have to vote on all talks, the order of talks is randomized, so as long as enough folks vote on a few talks, every talk should get a fair number of votes. You can vote for every talk between 0 - 5, where 5 is the best vote you can give. Also its possible to leave a comment and feedback for the speaker. The deadline to cast your votes is the last day of June.