This may refer to the "mountain of content" found in a megapack, or it could be a leftover term from unrelated travel or lifestyle SEO strings. Safe Ways to Follow Verona Van De Leur
These are animated emoticons or stickers used in messaging apps.
The phrase "animoticons mountain" appears to be a "keyword salad"—a string of semi-random words used to manipulate search engine results (SEO) or trigger specific automated scripts.