Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Databases & data4 min
Looker Studio Guide: Free Dashboards from Google Sheets
Looker Studio turns Google Sheets, BigQuery and dozens of other sources into interactive dashboards for free. What matters most is a clean source table and deliberate sharing settings: whose credentials the data source uses and who can download the data.
Practice - Hosting & cloud4 min
What Happens When a Domain Expires and How Not to Lose It
An expired domain does not disappear at once: it goes through a grace period, then a costlier redemption period, and only then is released for anyone to register; the site and email stop working early, so auto-renew and a current contact email are the best protection.
Basics - IT careers3 min
How to Give and Receive Code Review Feedback Professionally
Comment on the code, not the person, explain the reason and label how important each remark is; when receiving feedback, separate yourself from the code, ask about anything unclear and take long debates to a call or to team conventions.
Practice - Tools & no-code4 min
Data Validation and Dropdown Lists in Google Sheets and Excel
Data validation restricts what can be typed into a cell: a list of values, a number or date range, or a custom formula; set it to reject bad input with a clear message and shared tables stop collecting junk.
Practice - IT by industry4 min
Crop Monitoring With Drones and Satellite Imagery (NDVI)
NDVI compares how plants reflect red and near-infrared light to show where crops are weaker; satellites give regular coverage, drones give detail, and the result becomes prescription maps for machinery.
Advanced - Networks & office IT4 min
How Wi-Fi Works: A Plain Guide for Office Managers
Wi-Fi is a shared radio channel where an access point and its devices take turns to transmit, so real speed depends on signal through walls, channel congestion and how many devices share each access point.
Basics - IT for business3 min
How to Choose a Software Development Company
Do not pick a vendor by price or a pretty portfolio. Use six criteria: relevant experience, a real team, a clear process, transparent communication, a fair contract and verifiable references.
Practice - Web development3 min
Web Animations: CSS vs JavaScript, GSAP and Motion
Handle simple state changes (hover, reveal, expand) with CSS and complex sequences or scroll-driven scenes with GSAP or Motion; animate only transform and opacity, and turn motion down for prefers-reduced-motion.
Practice - SEO4 min
How to Set Up and Optimize a Google Business Profile
Create a profile at business.google.com, verify it, pick the most precise primary category and fill in every field. Then keep adding photos and posts, ask for reviews and reply to each one.
Practice - DevOps4 min
Docker vs Virtual Machines: Key Differences and When to Use Each
A virtual machine emulates an entire computer with its own OS, while a Docker container is an isolated process on the host's shared kernel. Containers are lighter and faster; VMs offer stronger isolation and a free choice of OS.
Basics - AI & automation4 min
AI vs Machine Learning vs Deep Learning: What Is the Difference
They are nested: artificial intelligence is the whole field, machine learning is the part where rules are learned from data, and deep learning is the part of ML built on multi-layer neural networks; LLMs belong to deep learning.
Basics - Programming4 min
Why 0.1 + 0.2 ≠ 0.3: Floating Point and Money in Code
Floats store numbers approximately in binary, so money should be kept as integers in minor units (cents, tiyin) or in decimal types such as Decimal and NUMERIC.
Practice - Mobile development4 min
How to Make Users Update Your App: Force and Flexible Updates
On launch the app fetches minimum and latest versions from the server: below minimum shows a blocking update screen, below latest a soft prompt, while the API keeps serving old clients until they move.
Practice - Marketing & analytics4 min
GA4 E-commerce Tracking with dataLayer: Full Setup Guide
Your site pushes GA4 recommended events (view_item, add_to_cart, begin_checkout, purchase and others) with an items array to the dataLayer, and GTM forwards them to GA4 with a single tag. What matters most is a consistent item structure across events, a unique transaction_id and regular revenue checks against your backend.
Advanced - Design & UX4 min
Figma Components and Variants: How to Set Them Up
A Figma component is a main element whose copies (instances) update when you change it. Variants bundle states and sizes into one set, and component properties (text, boolean, instance swap) let you configure instances without detaching them.
Practice - Telegram & messengers4 min
How to Track Telegram Bot Analytics: Metrics and Tools
Log every user action as an event on your server, pass the traffic source through the start parameter in the bot link, then calculate starts, activation, retention, funnel conversion and block rate in your own database or a product analytics tool.
Practice - E-commerce & CRM4 min
Online Store Fraud: Fake Orders, Card Testing and How to Stop Them
Most attacks on a store follow repeatable patterns, so they are stopped with rate limits, velocity rules, phone verification and a manual review queue for risky orders.
Practice - Security4 min
How to Create a Strong Password You Can Actually Remember
A strong password is long and random, not clever: use a passphrase of four to six random words for the few passwords you must remember, keep every password unique, and let a password manager remember the rest.
Basics - Databases & data4 min
How to Set Up Metabase for Business Dashboards
Run Metabase in Docker with its own PostgreSQL application database, connect your data through a read-only user, build questions into dashboards, restrict access with groups and send dashboards by email on a schedule.
Practice - Hosting & cloud3 min
Edge Functions vs Serverless Functions: What to Use When
Edge functions run close to the user and suit lightweight logic that does not hit a distant database; regional serverless functions run next to your data and suit business logic, database queries and longer operations.
Advanced - IT careers3 min
Hard Skills vs Soft Skills in IT: What Employers Value
Hard skills get you into the interview, while soft skills — communication, estimation, ownership and handling feedback — decide how fast you grow, and their weight increases with every grade.
Basics - Tools & no-code3 min
FILTER, SORT and UNIQUE in Google Sheets and Excel
FILTER keeps rows that match conditions, SORT orders them and UNIQUE removes duplicates; combined, they give you a report that updates itself whenever the source data changes, with no manual filters or copying.
Practice - IT by industry4 min
How to Deliver Lab Test Results to Patients Online
The reliable setup is simple: the LIS generates the PDF, the patient gets a notification with no medical details, verifies identity and opens the result in a portal or via a secure link.
Practice - Networks & office IT4 min
Hybrid Work IT Checklist: Equipment, Access and Security
Hybrid work rests on four things: a managed, encrypted laptop, sign-in with MFA plus VPN or cloud services, one shared file store and a clear support process that works the same at home and in the office.
Practice
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