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ISO (In Search Of): Commonly used in online communities to indicate someone is looking for something specific.
“ISO” stands for In Search Of. It’s commonly used in online communities, classified groups, forums, and marketplaces to indicate that someone is looking for a specific item, service, or information.
ISO is often followed by the item or service a user is searching for. It’s a quick, shorthand way to crowdsource help or find exactly what you need. For example:
“ISO a size 8 black prom dress”
“ISO recommendations for local dog groomers”
Mostly seen in:
Facebook buy/sell groups
Reddit threads
Craigslist posts
Niche hobby forums
Discord communities
Instagram stories or captions (especially among fashion or resale pages)
ISO has grown in popularity thanks to peer-to-peer marketplaces and community-driven platforms. It’s especially big in resale culture (fashion, furniture, baby gear, etc.) and recommendation-driven groups. It’s quick, searchable, and universally understood in online circles.
People often use ISO to find products or services they’re willing to pay for—so it plays a subtle but powerful role in driving community commerce. Brands or sellers monitoring groups with ISO requests can directly reach interested buyers without traditional advertising.
The main goal is to get help from the community to find something that may not be easily found via search engines or stores. It saves time and taps into the collective knowledge or inventory of the group.
Used when someone wants to be transparent about what they need and invite others to offer suggestions, links, or items for sale. It sets the tone: “I need help finding this—anyone got me?”
Clear and concise way to make a request
Sparks helpful community interaction
Increases your chances of finding niche or hard-to-find items
Great for both buyers and sellers to connect efficiently
Be specific: Add size, location, condition, or budget details if possible.
Be polite: Use “please” or “thanks in advance.”
Don’t spam with multiple ISO posts.
Update your post when you’ve found what you’re looking for.
ISO mid-century modern coffee table under $200 in NYC
ISO a photographer for a May wedding in Atlanta
ISO the viral Zara pink dress, size M
WTB (Want to Buy)
LF (Looking For)
Seeking
Need
When someone replies to an ISO post, they usually offer:
A link to a product
A recommendation
A picture of an item they’re selling
A simple comment like: “I have one!” or “DM me, I know someone.”
ISO is commonly used on social media platforms, in online communities, and in classified ads.
People use ISO because it is a quick and simple way to communicate their needs.
If you see an ISO post, you can respond in several ways:
By knowing what ISO means and how to use it, you can better communicate your needs and help others in online communities.