Email deliverability is crucial for the success of any email marketing campaign. Several factors can affect deliverability, including sender reputation, email content, and recipient engagement. To improve deliverability, ensure you are using a reputable email service provider (ESP), maintain a clean email list by regularly removing inactive subscribers, and avoid using spammy words or phrases in your emails. Implementing DKIM, SPF, and DMARC records can also help in authenticating your emails and improving deliverability rates.