I'd like to emphasize that Tofugu articles are super high quality, interesting, and helpful.
Highlighting important words with a highlighter helps you memorize them.
I’d just like to stress again that dressing neatly and being polite are very important for this job.
If you use a strong tone on certain words, then you are putting emphasis on whatever it is you're talking about it. It's the stress you put on things that are important because your tone gets stronger on those words or syllables.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.