diff --git a/public/cv.pdf b/public/cv.pdf
index f102d8a..0fd606a 100644
Binary files a/public/cv.pdf and b/public/cv.pdf differ
diff --git a/src/data/helpers/links.ts b/src/data/helpers/links.ts
index 60c34e3..53b4e61 100644
--- a/src/data/helpers/links.ts
+++ b/src/data/helpers/links.ts
@@ -1,5 +1,23 @@
 import createLinkFactory from '@/data/_internals/create-link-factory';
 
+/*
+
+Use this file to define all websites you use as the "links" property.
+This way, you can ensure one website has the same name and icon, among all resume sections.
+
+Where links are used:
+- education-section.data.ts
+- experience-section.data.ts
+- main-section.data.ts
+- portfolio-section.data.ts
+- skills-section.data.ts
+- testimonials-section.data.ts
+
+Usage examples:
+link({ url: '...' }) — returns base link object with provided url.
+link({ name: '...', url: '...' }) — returns link object with a custom name.
+*/
+
 // GENERAL
 
 export const facebook = createLinkFactory({
diff --git a/src/data/helpers/skills.ts b/src/data/helpers/skills.ts
index ac757d7..e6c6646 100644
--- a/src/data/helpers/skills.ts
+++ b/src/data/helpers/skills.ts
@@ -1,5 +1,23 @@
 import createSkillFactory from '@/data/_internals/create-skill-factory';
 
+/*
+
+Place where you can define all your skills.
+This way, you can ensure one skill has the same name, icon, and URL among all resume sections.
+
+Where skills are used:
+- experience-section.data.ts
+- portfolio-section.data.ts
+- skills-section.data.ts
+
+Usage examples:
+skill() — returns skill object without any customizations.
+skill({ level: 3 }) — returns a levelled-skill. It can be used only in skills-section.data.ts.
+skill({ name: '...' }) — returns skill object with a custom name.
+skill({ description: '...' }) — returns skill with a description displayed when user hovers over it.
+
+*/
+
 export const apolloGraphql = createSkillFactory({
   name: 'Apollo GraphQL',
   icon: 'simple-icons:apollographql',