All settings live under Settings → SVG Support in your WordPress dashboard. Sensible defaults are in place — most sites only ever touch Advanced Mode.

Basic settings

SettingWhat it does
Restrict SVG Uploads to Select which user roles may upload SVG files. SVGs are XML code, so letting untrusted users upload them poses real security risks — keep this limited to administrators unless you know what you're doing.
Do not sanitize for these roles Roles selected here bypass SVG sanitization on upload. Only bypass for roles you fully trust — e.g. if a trusted designer's hand-crafted SVGs are being altered by the sanitizer.
Sanitize SVG on Front-end Sanitizes SVG output on the front end as well, adding defense in depth against XSS and injection attacks.
Minify SVG Automatically minifies every SVG on upload, shrinking file size.
Load frontend CSS Loads a very small piece of CSS that helps SVGs display correctly on the front end in some themes.
Enable Advanced Mode The gateway to inline rendering and the options below. You don't need it to simply use SVGs as images — leave it off unless you use the advanced features, since it adds a small JS file to your front end.

Advanced settings (visible when Advanced Mode is on)

SettingWhat it does
CSS Class to target The class the plugin looks for when swapping img tags for inline SVG code. Default is style-svg; set your own (e.g. inline-svg) if you prefer. The plugin traverses any depth below an element carrying the class.
Skip Nested SVGs When enabled, only the first SVG in a .style-svg container is inlined. Useful for Gutenberg Cover blocks that have SVG images nested inside them.
Output JS in Footer Enqueues the plugin's JS before the closing </body> tag instead of in the head. Footer is usually the right choice; requires your theme to call wp_footer().
Use Vanilla JS Uses the dependency-free vanilla JS file instead of the jQuery version.
Use Expanded JS Enqueues the readable, non-minified JS file — useful if a caching/minification plugin bundles and minifies your scripts externally.

Legacy settings

SettingWhat it does
Force Inline SVG Use with caution. Adds the target class to all img tags with SVG sources in the rendered HTML, inlining every SVG on the site. Handy when a page builder (e.g. Divi) won't let you add a CSS class to an image.
Automatically insert class (Classic Editor only) Inserts the target class into img tags automatically when you embed an SVG in a post, and strips the default WordPress classes. Only affects SVG files.

Danger zone

SettingWhat it does
Delete Plugin Data When checked, all of the plugin's data is removed if you uninstall it. Leave unchecked to keep settings through a reinstall.
In-dashboard help: the settings page also has a Help tab (top right of the screen) covering all of this, right where you need it.