✅ 7 criteria passed
❌ 4 criteria to solve
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PurpleAir | Real Time Air Quality Monitoring
http://purpleair.com
A low cost air quality sensor network providing real time measurement of air quality on a public map. Useful to citizen scientists or air quality professionals alike...
http://purpleair.com
PurpleAir | Real Time Air Quality Monitoring
A low cost air quality sensor network providing real time measurement of air quality on a public map. Useful to citizen scientists...
No 301 redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. are treated as duplicate content! Not all versions of your page point to the same URL.
Attribute | Value |
ⓘ viewport | width=device-width,initial-scale=1 |
ⓘ The results of our semantic analysis are shown below using the website's language.
They are the main concepts covered by purpleair.com.
Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.
Topics | |
Wi-Fi Confidence: 81%
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Wireless sensor network Confidence: 77%
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Air pollution Confidence: 71%
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Citizen science Confidence: 70%
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Sensor Confidence: 70%
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✅ purpleair.com website speed is fast. Page speed is important for visitors and search engines.
Get insights to improve your page loading time.
This domain loads at the median speed of 0.5 seconds.
purpleair.com is faster than approximately 95 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.
A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.
ⓘ This website is ranked #80.092 by Alexa.
This rank is traffic based. The lower the rank is, the better the domain is ranked.
Country | Rank |
United States of America | #15.739 |
Mobile Rendering
This website seems to be optimized for Mobile Visitors.
Phone
Tablet
A good text to HTML ratio is anywhere from 25 to 70%.
This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.
Great, we found headings on this page.
However, you have not defined a top level heading, or <H1>. It is used to define the most important heading.
We recommend using one top level heading to set up a semantic relationship between that heading and the remainder of the content on a page. It clearly describes to the readers and the search engines what it is about.
2nd level heading |
Purpleair: real time air quality monitoring |
A proven air quality monitoring solution for home enthusiasts and air quality professionals alike |
Air quality sensors |
We found 16 images on this website.
3
ALT attributes are missing on your image tags. The issue affects 2 actual different images that could be loaded more than once in your page.
Alternative text allows you to add a description to an image.
Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.
It looks like you're missing alternative text for 3 images on purpleair.com. Check your website to make sure it's specified for each image on the page.
Anchor | Type | URL |
image | / | |
Home | text | / |
Store | text | /collections/air-quality-sensors |
All Sensors | text | /collections/air-quality-sensors |
PA-II | text | /products/purpleair-pa-ii |
PA-II-SD | text | /products/purpleair-pa-ii-sd |
PA-I-Indoor | text | /products/purpleair-pa-i-indoor |
Install | text | /pages/install |
Cart | text | /cart |
PurpleAir PA-II | text | /collections/air-quality-sensors/products/purpleair-pa-ii |
PurpleAir PA-II-SD | text | /collections/air-quality-sensors/products/purpleair-pa-ii-sd |
PurpleAir PA-I-Indoor | text | /collections/air-quality-sensors/products/purpleair-pa-i-indoor |
PurpleAir Sensors | text | /collections/air-quality-sensors |
Technology | text | /pages/technology |
Payment Methods | text | /pages/payment-methods |
Warranty | text | /pages/warranty |
Contact Us | text | /pages/contact-us |
PurpleAir | text | / |
Anchor | Type | URL |
Map | text | http://www.purpleair.com/map?mylocation |
Register | text | https://www.purpleair.com/register |
FAQ | text | http://shop.purpleair.com/community/faq |
View the Map | text | https://www.purpleair.com/map?mylocation |
image | https://www.wunderground.com/ | |
image | https://www.ccair.org/ | |
image | https://cleanaircarolina.org/ | |
image | https://www.ezsbc.com/ | |
image | http://www.aqmd.gov/aq-spec/product/purpleair-pa-ii | |
Registration | text | https://www.purpleair.com/register |
WiFi Configuration | text | http://www.purpleair.com/configure |
FAQ | text | https://shop.purpleair.com/community/faq |
text | https://www.facebook.com/groups/purpleair/ | |
Terms & Conditions | text | https://shop.purpleair.com/policies/terms-of-service |
Privacy Policy | text | https://shop.purpleair.com/policies/privacy-policy |
ⓘ Domain Registrar | EASYDNS TECHNOLOGIES INC. |
ⓘ Registration Date | 09/28/2015 9 years, 1 month, 9 days ago |
ⓘ Last Modified | 07/01/2018 6 years, 4 months, 8 days ago |
ⓘ Expiration Date | 09/28/2021 Expired |
Host | IP Address | Country |
dns1.zoneedit.com | 45.77.82.193 | United States |
dns2.zoneedit.com | 45.79.110.158 | United States |
dns3.zoneedit.com | 45.76.95.243 | Germany |
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SOCIAL MEDIA PRESENCE
You're doing quiet good on social media!
Social shares are a key signal, among many others, that search engines use to evaluate the rankings of a website. Asking people to share your pages, adding visible social share buttons and make great quality content are 3 of the most powerful ways to grow your social presence.