datalesson.ru

https://datalesson.ru· First analyzed 19 May 2026· Updated 19 May 2026

Export

datalesson.ru

Mobile

Sponsored

Hosting Provider

Yandex LLC

IP Address

84.201.188.68

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS200350

Organization

Yandex LLC

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

yadiel.ns.cloudflare.com.megan.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.0 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3 MB

118 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Yandex LLC

CDN

Cloudflare

Technology Stack

7 Technologies Detected

UI Components

Slick Carousel Fancybox

Frameworks

Libraries

Other

CSS Frameworks

Web Servers

SEO Analysis

D59/100

Meta Tags7/15

Content10/12

Headings8/8

Technical13/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile1/4

Indexability3/3

datalesson.rudatalesson.ru

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Title truncated. Description truncated.

Title Length76 chars

Recommended: 50-60 chars (~471px / 580px)

Description Length275 chars

Recommended: 120-160 chars

Issues (1)

• Title is too long (76 chars, ~471px). Will be truncated in search results.

11 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

73 rules

Local SEO

Local Search Readiness

8/100

Poor

2 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D45/100

Bot Access

20/25

Machine Read.

16/25

Schema Data

0/25

Citation

9/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txtvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:23%

Words:4,814

Token eff.:Good

Sections/1K:7.3

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 2.7w

Canonical URL

Open Graph2/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

60/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

14/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

0/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

2/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

16/100

381 mg

CO₂e / view

3.0 MB

Page Weight

30%

Cleaner Than

New Visitor

435 mg

Returning (cached)

218 mg

Annual (10K/mo)

45.7 kg

Emission Segments

Data Center

85 mg

Network

91 mg

Device

204 mg

Resource Breakdown

JavaScript

443.0 KB

Images

2.3 MB

CSS

236.4 KB

HTML

25.8 KB

Other

2.5 KB

Green Hosting Not Verified

Yandex LLC

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

44d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

04.04.2026

Valid Until

03.07.2026

Subject Alternative Names (7)

datalesson.rustage.datalesson.ruwww.datalesson.ruwww.xn--80abcmq4aw.xn--h1adlhdnlo2c.xn--p1aiwww.xn--h1adlhdnlo2c.xn--p1aixn--80abcmq4aw.xn--h1adlhdnlo2c.xn--p1aixn--h1adlhdnlo2c.xn--p1ai

SHA-256 Fingerprint

68:9E:C6:6A:BE:59:03:44:3F:06:72:61:FB:F1:2B:A8:45:DE:36:17...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, private)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Tue, 19 May 2026 20:12:28 GMT

keep-alive

timeout=15

Good Warning Issue

Email Infrastructure

Mailgun

Score

SPF

DKIM

DMARC

MX Records (2)

mxb.eu.mailgun.org

mxa.eu.mailgun.org

Domain Information

datalesson.ru

Domain Age

7y 5m

Created

26.11.2018

Expires

26.11.2026

Registrar

REGRU-RU

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

71/100

Mobile Friendly3 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Gilroy

WCAG Partial

69/100

Readability

/30

23/30

18px · LH 1.70

Hierarchy

/20

19/20

4.44x ratio · ✓ H1→H6

WCAG

/25

14/25

1:1 min contrast

Performance

/25

13/25

1 font · 4 req

Heading Font

Gilroy

Sans80px

Body Font

Gilroy

Sans18px

Contrast Ratio

1:1

17 issues

Reading Comfort

~40 CPL

Narrow lines

80px

58px

46px

14px

18px

Minor Second

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Partial contrast: 17 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 4.4x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

9 unique colors

Light

#2e3192

Primary· 74.2%

#232674

Primary· 5.9%

#9287ac

Secondary· 4.2%

#fbfaf9

Secondary· 3.3%

#604a95

Secondary· 3.2%

#98d0f0

Accent· 2.8%

#472e79

Secondary· 1.7%

#191850

Accent· 1.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

datalesson.ru(12)top-fwz1.mail.ru(2)vk.com(2)mc.yandex.ru(1)privacy-cs.mail.ru(1)

Website Identity

datalesson.ru

urok@data-economy.ru

7 years old

Location detected: 🇷🇺 Russiavia tld

REGRU-RU📧 Mailgun

Social Profiles

YouTube Telegram

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Last analyzed: 19 May 2026 at 20:12

Historical Analysis & Change Tracking