---
layout: page_v2
title: Common Issues
description: Common Issues for developers implementing Prebid.js Header Bidding.
pid: 10

top_nav_section: dev_docs
nav_section: troubleshooting
sidebarType: 1

---


# Common Issues with Prebid.js

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This page lists some common issues publishers run into when setting up Prebid.

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## Price Granularity Mismatch

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For example, if your site's price granularity setup is at $0.10 increment, but the line items are expecting $0.50 increments, bid prices such as $0.71 or $0.99 would not match any line items.

## Non-Prebid line items are at higher priority

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If you have sponsorship line items running, even with lower bid prices, the Prebid line items won't win. To find out whether you have higher-priority line items running, use your ad servers' debugging tools, such as the [Google Publisher Console](https://support.google.com/dfp_sb/answer/2462712?hl=en&visit_id=1-636195762630970892-522080225&rd=1).

## Bids are coming back, but ads don't show up

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Check the bid prices. If they are low and are getting reduced to $0 due to price granularity settings, your ad server may choose not to serve them (or you may not have line items targeting $0 bids in your ad server).  For example, if you set a $0.50 price granularity and get a bid price of $0.40, the actual price key-value that your ad server will see is $0.00.

## Related Reading

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* [Prebid.js FAQ](/dev-docs/faq.html)
* [Prebid Tips for Troubleshooting](/troubleshooting/troubleshooting-guide.html)
* [Price Granularity](/adops/price-granularity.html)