# Polymarket Help Center > Guides, articles and support to learn about Polymarket. ## Getting Started - [What is Polymarket](https://help.polymarket.com/en/articles/13364060-what-is-polymarket.md): Polymarket is the world’s largest prediction market, allowing you to stay informed and profit from your knowledge by betting on future events across various topics. - [How to Sign-Up](https://help.polymarket.com/en/articles/13369877-how-to-sign-up.md): How to create a Polymarket account. - [How to Deposit](https://help.polymarket.com/en/articles/13369887-how-to-deposit.md): How to add cash to your balance on Polymarket. - [How to Withdraw](https://help.polymarket.com/en/articles/13369898-how-to-withdraw.md) ## Markets - [How Are Prices Calculated?](https://help.polymarket.com/en/articles/13364488-how-are-prices-calculated.md): The prices probabilities displayed on Polymarket are the midpoint of the bid-ask spread in the orderbook. - [How Are Prediction Markets Resolved?](https://help.polymarket.com/en/articles/13364518-how-are-prediction-markets-resolved.md): Markets are resolved by the UMA Optimistic Oracle, a smart-contract based optimistic oracle. - [How Are Markets Created?](https://help.polymarket.com/en/articles/13364541-how-are-markets-created.md): Markets are created by the markets team with input from users and the community. - [How Are Markets Clarified?](https://help.polymarket.com/en/articles/13364548-how-are-markets-clarified.md): How are markets on Polymarket clarified? - [How Are Markets Disputed?](https://help.polymarket.com/en/articles/13364551-how-are-markets-disputed.md): Anyone can dispute a proposed market resolution if they feel it was proposed in error. - [Sponsor Market Rewards](https://help.polymarket.com/en/articles/13755867-sponsor-market-rewards.md): Want deeper liquidity on a market you care about? You can sponsor rewards to incentivize market makers to provide more liquidity - making prices more accurate and trades easier to execute. ## Trading - [Limit Orders](https://help.polymarket.com/en/articles/13364444-limit-orders.md): What are limit orders and how to make them. - [Holding Rewards](https://help.polymarket.com/en/articles/13364459-holding-rewards.md): Earn rewards on eligible positions while helping maintain long-term market pricing accuracy - [Liquidity Rewards](https://help.polymarket.com/en/articles/13364466-liquidity-rewards.md): Learn how to earn rewards merely by placing trades on Polymarket - [Maker Rebates Program](https://help.polymarket.com/en/articles/13364471-maker-rebates-program.md): Earn daily USDC rebates by providing liquidity on Polymarket - [Trading Fees](https://help.polymarket.com/en/articles/13364478-trading-fees.md): Understanding Fees on Polymarket - [Does Polymarket Have Trading Limits?](https://help.polymarket.com/en/articles/13364481-does-polymarket-have-trading-limits.md): By design, the Polymarket orderbook does not have trading size limits. It matches willing buyers and sellers of any amount. - [Referral Program](https://help.polymarket.com/en/articles/14174498-referral-program.md): Earn rewards by referring users to Polymarket - [Polymarket Exchange Upgrade: April 28, 2026](https://help.polymarket.com/en/articles/14762452-polymarket-exchange-upgrade-april-28-2026.md): Learn more about the upcoming exchange upgrades. - [What are Combos?](https://help.polymarket.com/en/articles/15458600-what-are-combos.md): Understanding Combos on Polymarket ## FAQs - [Geographic Restrictions](https://help.polymarket.com/en/articles/13364163-geographic-restrictions.md): Countries and regions where Polymarket is restricted - [How To Use Embeds](https://help.polymarket.com/en/articles/13364174-how-to-use-embeds.md): Adding market embeds to your Substack or website. - [Polymarket vs. Polling](https://help.polymarket.com/en/articles/13364238-polymarket-vs-polling.md): How is Polymarket better than traditional / legacy polling? - [Recover Missing Deposit](https://help.polymarket.com/en/articles/13364241-recover-missing-deposit.md): Sent the wrong token or used the wrong network when depositing? Here's how to recover your funds. - [Can I Sell Early?](https://help.polymarket.com/en/articles/13364247-can-i-sell-early.md): Yes, you can sell or close your position early. - [Does Polymarket Have a Token?](https://help.polymarket.com/en/articles/13364250-does-polymarket-have-a-token.md) - [Does Polymarket have an API?](https://help.polymarket.com/en/articles/13364254-does-polymarket-have-an-api.md): Getting data from Polymarket - [How Do I Contact Support?](https://help.polymarket.com/en/articles/13364256-how-do-i-contact-support.md) - [How Do I Export My Key?](https://help.polymarket.com/en/articles/13364258-how-do-i-export-my-key.md): Exporting your private key on Magic.Link - [Is My Money Safe?](https://help.polymarket.com/en/articles/13364260-is-my-money-safe.md): Yes. Polymarket is non-custodial, so you’re in control of your funds. - [Is Polymarket The House?](https://help.polymarket.com/en/articles/13364264-is-polymarket-the-house.md): No, Polymarket is not the house. All trades happen peer-to-peer \(p2p\). - [Why Crypto?](https://help.polymarket.com/en/articles/13364268-why-crypto.md): Why Polymarket uses crypto and blockchain technology to create the world’s largest Prediction market. - [What is a Prediction Market?](https://help.polymarket.com/en/articles/13364272-what-is-a-prediction-market.md): How people collectively forecast the future. - [How to Delete Your Polymarket Account](https://help.polymarket.com/en/articles/15458866-how-to-delete-your-polymarket-account.md): Account deletion guide - [Website vs App - What's the Difference?](https://help.polymarket.com/en/articles/15458828-website-vs-app-what-s-the-difference.md): Understanding the difference between Polymarket US vs International ## Troubleshooting - [How to Resolve "Network Error"](https://help.polymarket.com/en/articles/13510453-how-to-resolve-network-error.md): If you see a "Network Error" pop-up, try these 3 quick fixes. - [How to Resolve "Claim Failed"](https://help.polymarket.com/en/articles/13550400-how-to-resolve-claim-failed.md): If you receive an error while trying to claim your shares, it is likely due to a mismatch on your device.