Here are some of the useful links and articles that relate to Salesforce deployments:
Salesforce Metadata API: https://developer.salesforce.com/docs/atlas.en-us.api_meta.meta/api_meta/meta_intro.htm
Special Behavior during Deployment: https://developer.salesforce.com/docs/atlas.en-us.api_meta.meta/api_meta/meta_special_behavior.htm
StackExchange: https://salesforce.stackexchange.com/
Salesforce Known Issues: https://success.salesforce.com/issues_index