Activities such as searching, voting and suggesting edits are rate-limited on Stack Exchange sites. These restrictions generally exist to prevent abuse. If you attempt to perform these actions too frequently you may see a warning message.

Activities such as searching, voting and suggesting edits are rate-limited on Stack Exchange sites. These restrictions generally exist to prevent abuse. If you attempt to perform these actions too frequently you may see a warning message.

For more details see: The Complete Rate-Limiting Guide.