Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
<sub>& <sup>tags, any SEO issues?</sup></sub>
-
Hi - the content on our corporate website is pretty technical, and we include chemical element codes in the text that users would search on (like S02, C02, etc.) A lot of times our engineers request that we list the codes correctly, with a <sub>on the last number. Question - does adding this code into the keyword affect SEO? The code would look like SO<sub>2</sub>.</sub>
Thanks.
-
Hi Jenny
jStrong is correct. Subscript (<sub>) and superscript (<sup>) tags are not going to have any effect (positive or negative) on SEO.</sup></sub>
-
Hi Jenny,
I don't think these tags would have any affect on the SEO. They are formatting tags the same as _or _that only affect the styling of the text they surround and it is unlikely that when crawled they are treated as anything but that. __
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Best Web-site Structure/ SEO Strategy for an online travel agency?
Dear Experts! I need your help with pointing me in the right direction. So far I have found scattered tips around the Internet but it's hard to make a full picture with all these bits and pieces of information without a professional advice. My primary goal is to understand how I should build my online travel agency web-site’s (https://qualistay.com) structure, so that I target my keywords on correct pages and do not create a duplicate content. In my particular case I have very similar properties in similar locations in Tenerife. Many of them are located in the same villa or apartment complex, thus, it is very hard to come up with the unique description for each of them. Not speaking of amenities and pricing blocks, which are standard and almost identical (I don’t know if Google sees it as a duplicate content). From what I have read so far, it’s better to target archive pages rather than every single property. At the moment my archive pages are: all properties (includes all property types and locations), a page for each location (includes all property types). Does it make sense adding archive pages by property type in addition OR in stead of the location ones if I, for instance, target separate keywords like 'villas costa adeje' and 'apartments costa adeje'? At the moment, the title of the respective archive page "Properties to rent in costa adeje: villas, apartments" in principle targets both keywords... Does using the same keyword in a single property listing cannibalize archive page ranking it is linking back to? Or not, unless Google specifically identifies this as a duplicate content, which one can see in Google Search Console under HTML Improvements and/or archive page has more incoming links than a single property? If targeting only archive pages, how should I optimize them in such a way that they stay user-friendly. I have created (though, not yet fully optimized) descriptions for each archive page just below the main header. But I have them partially hidden (collapsible) using a JS in order to keep visitors’ focus on the properties. I know that Google does not rank hidden content high, at least at the moment, but since there is a new algorithm Mobile First coming up in the near future, they promise not to punish mobile sites for a collapsible content and will use mobile version to rate desktop one. Does this mean I should not worry about hidden content anymore or should I move the descirption to the bottom of the page and make it fully visible? Your feedback will be highly appreciated! Thank you! Dmitry
Technical SEO | | qualistay1 -
Title Tag vs. H1 / H2
OK, Title tag, no problem, it's the SEO juice, appears on SERP, etc. Got it. But I'm reading up on H1 and getting conflicting bits of information ... Only use H1 once? H1 is crucial for SERP Use H1s for subheads Google almost never looks past H2 for relevance So say I've got a blog post with three sections ... do I use H1 three times (or does Google think you're playing them ...) Or do I create a "big" H1 subhead and then use H2s? Or just use all H2s because H1s are scary? 🙂 I frequently use subheads, it would seem weird to me to have one a font size bigger than another, but of course I can adjust that in settings ... Thoughts? Lisa
Technical SEO | | ChristianRubio0 -
Custom hreflang tags in WP & using with Yoast
Hi My clients dev has added custom fields for adding hreflang tags to head of pages such as: "Rel Type", "The URL", and "Language Code" Am i right in thinking that until a different language/country version of the site is created these can remain empty or should they still be populated once added say with some sort of global reference or best left blank since will leave the head content global by default ? Also how important is it to add charset to the language code ? since seems optional ? Also this set up is on WP multi-site with Yoast and devs asked me the below: _One thing to note is that Yoast generates its own "canonical" tags - so if _
Technical SEO | | Dan-Lawrence
_you are going to use hreflang tags and canonical tags then you don't need to _
_add a canonical using the custom fields I have set up - Yoast has that _
sorted. _But if you are going down the route of NOT having any canonical tags - and _
_using a x-defult for the hreflang tags, I will need to try and suppress the _
_Yoast canonical tag so you can do this. Much depends on your approach and _
what you think is best. So how do i know if using canonicals or x-default, i take it best simplest to leverage Yoast and hence not add canonicals to custom fields ? Isnt x-default just for indicating language selectors/redirector not specific to 1 region? So long as havnt got those then good to proceed with Yoasts generated canonicals ? Cheers dan0 -
Will blocking the Wayback Machine (archive.org) have any impact on Google crawl and indexing/SEO?
Will blocking the Wayback Machine (archive.org) by adding the code they give have any impact on Google crawl and indexing/SEO? Anyone know? Thanks! ~Brett
Technical SEO | | BBuck0 -
Canonical tag for Home page: with or without / at the end???
Setting up canonical tags for an old site. I really need advice on that darn backslash / at the end of the homepage URL. We have incoming links to the homepage as http://www.mysite.com (without the backslash), and as http://www.mysite.com/ (with the backslash), and as http://www.mysite.com/index.html I know that there should be 301 redirects to just one version, but I need to know more about the canonical tags... Which should the canonical tag be??? (without the backslash) or (with the backslash) Thanks for your help! 🙂
Technical SEO | | GregB1230 -
SEO plugin by Yoast messing up my title/meta description
Hey guys, I'm having some issues with my wordpress blog, and I believe SEO plugin by Yoast could be the one causing it. I have set a title for my wordpress blog, and a tagline. This was set in dashboard > settings > general Under "titles and metas" > home in the plugin it says, title: %%sitename%% %%page%% %%sep%% %%sitedesc%%, and meta description is blank. The reports on seomoz says my title is title+meta description - making it to long (to many characters). What could be the issue here? Thanks in advance!
Technical SEO | | danielpett0 -
• symbol in title tag
We have a few title tags with a circular dot symbol, which is created by the code "•" Humans see a dot, but googlebot sees • Does this negatively impact our SEO, or is googlebot aware that **• == *** to human eyes
Technical SEO | | lighttable0 -
Iframes & SEO
I've got a client that wants a site with all content in iFrames. They saw another site they liked & asked if we could do it. Of course we can technically. How big a negative hit would they take with SEO? Is there anything we can do to mitigate it, such as redirects, etc? Thanks for the help!
Technical SEO | | wcksmith0
