You're watching a commercial for a frozen pizza. The announcer on the commercial says this.
We use only the finest ingredients.
advertisement, commercial, fancy, food 
You have a blog. It's started to become really popular. A friend asks how it became so popular, but you didn't do any advertisement for it. You say:
It's mostly just spread through word of mouth.
advertisement, blog, marketing, perfect aspect, website, 日本語サポート You're making a short film. You needed an actor, so you placed an ad calling for actors on a website. A lot of people responded. Now you're telling your assistant director about it. You say:
We got tons of responses to that ad I posted.
actors, advertisement, film, 日本語サポート 