Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Mobile development3 min
How to Speed Up a Mobile App: Startup Time, Frames and Memory
Measure first, on a real device with a release build, then optimize. The usual wins are deferring work at startup, caching and resizing images, virtualizing lists and moving heavy work off the main thread.
Practice - Marketing & analytics4 min
Meta Ads Targeting: Custom and Lookalike Audiences Explained
Custom audiences are people who already know you (site, customer list, social engagement), lookalikes are new people who resemble them, and once your pixel has enough conversions, broad targeting often performs as well as manual targeting.
Practice - Design & UX4 min
Raster vs Vector Graphics: Formats and When to Use Them
Raster images store a grid of pixels and suit photos, while vector images describe shapes mathematically and scale without loss, so logos and icons belong in vector and photos in JPG or WebP.
Basics - Telegram & messengers3 min
What Is Inline Mode in Telegram Bots and How to Use It
Inline mode lets users call a bot in any chat by typing @botname and a query; the bot returns a list of results and the user sends the chosen one into the current chat, which is ideal for sharing products, articles and links.
Basics - E-commerce & CRM4 min
Online Store Search and Filters: UX Best Practices
Good site search understands a query in any form, with typos, the wrong keyboard layout or a synonym, and never shows an empty screen, while filters mirror the criteria people actually use to choose products.
Practice - Security4 min
Security Audit vs Pentest vs Vulnerability Scan: The Difference
A vulnerability scan is a fast automated check for known issues, a pentest is a manual attempt to break in and prove real impact, and a security audit reviews whether your code, settings and processes meet a standard.
Basics - Databases & data5 min
SQL JOINs Explained: INNER, LEFT, RIGHT and FULL
A JOIN combines rows from two tables by a matching condition: INNER keeps only matches, LEFT keeps every row of the left table, RIGHT keeps every row of the right table, and FULL keeps everything from both, filling the gaps with NULL.
Basics - Hosting & cloud4 min
Shared vs VPS vs Dedicated Server: Which Hosting Do You Need
Shared hosting suits simple sites, a VPS suits growing projects and apps that need their own software and steady resources, and a dedicated server suits heavy workloads and strict isolation requirements.
Basics - IT careers4 min
Machine Learning Engineer vs Data Scientist: Roles and Skills
A data scientist answers business questions with data and models; an ML engineer turns models into reliable production services; an AI/LLM engineer builds products on top of existing language models.
Basics - Tools & no-code4 min
Online Meeting Booking: Calendly vs Google Calendar Booking Pages
A booking link shows clients only the free slots from your calendar and creates the meeting itself; Google Calendar is enough for simple one-person booking, while Calendly suits teams, complex rules and automation.
Basics - IT by industry4 min
How to Launch Online Courses: Platform, Payments and Access
To launch online courses, pick a platform that fits your sales model, split the course into short lessons, connect payments that grant and revoke access automatically, protect your videos and track completion.
Practice - Networks & office IT4 min
IT Asset Management for Small Business: What to Track and Why
IT asset management is one up-to-date list of hardware, software and subscriptions with owner, serial number, warranty and licenses; it shows what you pay for and makes replacement, repair and data protection easier.
Basics - IT for business4 min
MVP vs Prototype vs Proof of Concept: Key Differences
A PoC checks whether something is technically possible, a prototype checks whether it is clear and usable, and an MVP checks whether people will actually use it and pay for it.
Basics - Web development4 min
Node.js vs PHP for Web Backend: Honest Comparison
Both stacks fit most websites. Node.js is stronger for real-time and a single JavaScript stack, PHP with Laravel for classic sites, admin panels and cheap hosting; the team and the project usually decide.
Basics - SEO4 min
Do LSI Keywords Exist? How Search Engines Understand Meaning
LSI keywords are not a ranking factor: the term comes from an old text-analysis method search engines do not use. Modern systems understand meaning through entities, embeddings and context, so what matters is answering the question fully, not picking the "right words".
Basics - DevOps4 min
Essential Linux Commands for Server Administration
Day-to-day server work needs only a couple dozen commands: ls, df, du for files, ps, top, systemctl for processes, ss, curl for network, journalctl, tail for logs, apt or dnf for packages, and adduser, chmod for permissions.
Basics - AI & automation4 min
Human-in-the-Loop: Adding Approvals to AI Agent Workflows
Require human approval where an agent action is irreversible, costs money or leaves the company; let the agent do everything else on its own and log every step.
Practice - Programming4 min
Pass by Value vs Pass by Reference: How Arguments Work
Most popular languages pass a copy of the value, and for objects that value is a reference, so a function can mutate a shared object but cannot rebind the caller's variable; true pass by reference exists only where the language says so explicitly, like ref in C# or pointers in Go.
Basics - Mobile development4 min
Mobile App Security Checklist Based on OWASP MASVS
OWASP MASVS splits mobile security into storage, crypto, auth, network, platform, code, resilience and privacy; before release, walk through each group with short concrete checks and fix what you find.
Advanced - Marketing & analytics4 min
How to Launch Instagram and Facebook Ads in Meta Ads Manager
First set up a business portfolio with an ad account, Page, Instagram account and pixel, then in Ads Manager pick a campaign objective, configure audience, placements and budget in the ad set, upload creatives in the right formats and check them against Meta's advertising standards.
Practice - Design & UX4 min
Rebranding: When a Company Needs It and How to Do It
A rebrand is justified when the brand no longer reflects the business: the strategy, audience or market changed, or a merger happened. If the problem is only a dated look, a refresh is enough; either way, start with research and keep the elements people recognize.
Advanced - Telegram & messengers4 min
Inline vs Reply Keyboard in Telegram Bots: When to Use Each
A reply keyboard replaces the phone keyboard and sends text as the user, so use it for a persistent main menu; inline buttons are attached to a message and silently pass callback data, so use them for actions on that message.
Basics - E-commerce & CRM4 min
Order Processing With Sagas: Consistent Payment, Stock and Delivery
A saga splits an order into local steps with compensating actions, while an outbox and an order state machine ensure no event is lost and no order gets stuck in a contradictory state.
Advanced - Security4 min
Security Logging and Monitoring: What to Log and When to Alert
Log who did what, when, from where and with what result for logins, permission changes, admin actions and denied access; never log passwords, tokens or card data; keep logs centrally and alert on patterns like brute force, new admins and mass exports.
Practice
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