Boost data quality, build trust, and engage with customers in the ways they self-identify with gender-inclusive fields. Pronouns and Gender Identity are now included as optional picklist fields on the Lead, Contact, and Person Account objects. Use the vetted, default value sets or add your own picklist values to get a full picture of your constituents. Be sure to review any privacy implications of collecting this data before adding the new fields to your page layouts.
Where: This change applies to Lightning Experience, Salesforce Classic, and all versions of the mobile app in all editions.
How: From Setup, use the Object Manager to manage field-level security, add or edit picklist values, and add the new fields to your page layouts.
Capture Inclusive Data with Gender Identity and Pronouns Fields (salesforce.com)