Daily update frequency is recommended for all data feeds

The recommended feed refresh or submission frequency is Daily for all feeds.

Individual submissions and refreshes are free, so there is no additional cost to make this change. It is included with your feed service plan.

If available for your store platform, then the free, Daily Plus option is recommended.

(Auto-skip is a legacy setting and can be Disabled for all feeds.)

Google's Recommendation

Google's high-quality data requirements ask that you provide up-to-date pricing and availability information in order to provide the best experience for shoppers and improve your ranking. This is recommended even if your listings do not change often.

Refresh your bulk uploads to keep your data up to date. Our algorithm will demote items that are not refreshed regularly.

Source: http://googlebase.blogspot.com/2006/07/optimizing-base-items-to-get-more.html

Other Shopping Search Engines

Many other shopping engines also encourage frequent submissions to keep your listings fresh. For example, Bing and Facebook also have the capability to accept frequent data feed submissions. Therefore, to get the best results from all shopping engines, we recommend Daily submission of your feed.

Error Detection

Another advantage of Daily submission is that any issues with feed processing are identified sooner. The system monitors for repeated errors, so a Daily submission ensures that any persistent issue is detected in a timely way.

Instructions

1. Go to My Account
2. Click Manage for the feed
3. Click Modify Settings
4. Select Daily as the Update Frequency
5. Set Auto-Skip to Disabled
6. Click the Update button

Custom Scheduling Options

For custom scheduling or more frequent submissions, see:
Available Feed Scheduling Options: How often can I submit my feed?