What is a Yield Sign?

I (F29) am a new driver as of mid 2024 and have a driving question to ask so I know better for next time.

Today, around 1:40 PM, right near the Browns Socialhouse off Devonshire & Plessis: there is a yield sign for when you’re driving past Anytime Fitness and about to turn right at that Browns. I thought that means you watch for and yield to the people that are already coming down the way from the Tim Hortons side and approaching Browns because the people driving towards Browns from that way have no stop or yield signs in that shirt little stretch.

A woman in the first car sped through there and cut me off aggressively, and then the man behind almost t-boned me because he tried to keep going while I was already in that “intersection” space. Neither of them slowed down and were genuinely speeding considering we’re in a parking lot.

Google says it’s when “drivers must slow down, prepare to stop, and give the right-of-way to pedestrians, cyclists, and vehicles already in the intersection or merging lane.” Am I misinterpreting what a yield sign is?