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Webサイトの速度

How fast your website feels on a phone, and how to make it faster. We explain Google PageSpeed scores and Core Web Vitals — LCP, CLS and INP — in simple words. Articles show which images, scripts, fonts and server settings slow pages down the most. Each guide ranks fixes by impact, so you start with the change that saves the most seconds. We also cover hosting, caching and compression without needing a developer for every step. Faster pages keep more visitors and rank better in search.

How to Choose a WordPress Caching Plugin for Your Hosting2026/09/19 · 7分で読めます

How to Choose a WordPress Caching Plugin for Your Hosting

The best WordPress caching plugin depends on your web server and host. Learn which types exist, what to compare, what to avoid and how…

12 Website Speed Optimization Mistakes and How to Avoid Them2026/09/18 · 7分で読めます

12 Website Speed Optimization Mistakes and How to Avoid Them

Many speed projects waste time on the wrong fixes or break the site. Learn the 12 most common speed optimization mistakes and what to…

Total Blocking Time Explained: What It Means and How to Cut It2026/09/17 · 7分で読めます

Total Blocking Time Explained: What It Means and How to Cut It

Total Blocking Time measures how long the main thread is blocked while a page loads. Learn how TBT is calculated, how it relates to…

Website Speed Monitoring: Catch Slowdowns Before Customers Do2026/09/15 · 7分で読めます

Website Speed Monitoring: Catch Slowdowns Before Customers Do

Websites get slower over time as plugins, tags and content pile up. Learn what to monitor, how often, which tools to use and how…

Excessive DOM Size: Why It Slows Pages and How to Fix It2026/09/14 · 7分で読めます

Excessive DOM Size: Why It Slows Pages and How to Fix It

A page with thousands of HTML elements takes longer to style, lay out and update. Learn what causes an excessive DOM size, why it…

Responsive Images with srcset and sizes: A Practical Guide2026/09/13 · 7分で読めます

Responsive Images with srcset and sizes: A Practical Guide

srcset and sizes let each device download an image at the right size. Learn how they work, how to write the sizes attribute and…

Hero Sliders and Carousels: The Hidden Cost to Page Speed2026/09/12 · 7分で読めます

Hero Sliders and Carousels: The Hidden Cost to Page Speed

Homepage sliders look impressive but often delay the main image, add scripts and shift layouts. Learn what they cost and how to replace or…

Are Page Builders Slowing Down Your WordPress Website?2026/09/11 · 7分で読めます

Are Page Builders Slowing Down Your WordPress Website?

Page builders make design easy but add heavy CSS, JavaScript and markup. Learn where the cost comes from, how to measure it and how…

PageSpeed Insights vs GTmetrix vs WebPageTest: Which to Use2026/09/10 · 7分で読めます

PageSpeed Insights vs GTmetrix vs WebPageTest: Which to Use

PageSpeed Insights, GTmetrix, WebPageTest, Lighthouse and DevTools measure speed differently. Learn what each is good at and why their results disagree.

Does Page Speed Affect Google Rankings? What We Actually Know2026/09/08 · 7分で読めます

Does Page Speed Affect Google Rankings? What We Actually Know

Page speed is a Google ranking signal, but a smaller one than many believe. Learn what Google has said, how Core Web Vitals fit…

How Website Speed Affects Sales, Leads and Conversions2026/09/07 · 8分で読めます

How Website Speed Affects Sales, Leads and Conversions

Slow pages lose visitors before they see your offer. Learn how speed affects conversions, how to measure it on your site and which fixes…

Minifying CSS and JavaScript: What It Really Saves You2026/09/06 · 7分で読めます

Minifying CSS and JavaScript: What It Really Saves You

Minification strips whitespace and comments from CSS and JavaScript. Learn what it saves next to compression, how to enable it safely and when it…

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