Either go to extensions.joomla.org and click on the Advanced Look for link, or go straight to the Website above.
Category: Knowing the category your are trying to find, click on the drop-down box and select it. Blogging computer software, for instance, is located in the main category of Reports Production. If you don't know where your classification is, click on "All Categories" on the left navigation inbound links and all the categories of extensions come up. Do a control F on your browser (for Opera and Chrome at the very least) and then search for "blog" or maybe "content" or "tag" or whatever you want to find. Try and locate your category this way. The category field is the foremost way to narrow your pursuit.

Extension name: If you don't know the specific extendable you're looking for, leave that blank.
Description: Should you couldn't find a group, this is a good place to include a few keywords.
Certificate: Unless you know what you wish, just leave this industry blank.
Type: Decide on commercial (costs money in fact has support), non-commercial (no cost, but typically doesn't need support), or go away this field blank.
Compatibility: This is probably the second most crucial way to narrow your pursuit. Pick the appropriate version of joomla plugin. For anyone who is using Joomla One particular.5, click 1.5 Native and get away from Legacy.
Extension consists of: Components are mini-applications so when installed, show up in the component menu. Factors can typically be used all over a page. Modules tend to be designated for one stop on the screen. Plugins change how the whole website works, and are commonly transparent to you the moment they're installed. Should you not care, leave these boxes blank.
Filenames: Unless you know the specific Joomla 1.5 Plugin you're looking for, leave this blank.
Installs Seeing that: Unless you know the precise extension you're looking for, keep this blank.
"Research" each potential extension.
Look through your Advanced Serp's. Read the brief descriptions and determine if the item might meet your needs. Under the product's name, consider the number of stars along with the number of votes this product has. Also think about the number of reviews it's.
A product with no votes and no reviews probably means it's a brand new product or service. You can just give up on which product if you don't want to use new technology. Alternatively, you can search for other extensions made out of the same company and look those reviews. That will technique, at least, provides you with an idea of the company's customer support abilities.
Examine the number of reviews the product has. If a product offers less than ten opinions, read the reviews meticulously. Not everyone does it, however, some people write program code and then have their friends and families write reviews for the children. Chances are pretty good, however, that if a product has more than ten or so reviews, you'll find some "real" comments.
Look at the common star rating, but it's more important to read the specific reviews themselves. Once in a while someone uses a product, not have the necessary technical knowledge or perhaps have plain bad luck, and write a bad review. How do the company respond to in which review?
Is there a demonstration or a "lite" version you can try for free?
Once you've shrunken your choices to a few, see a companies' websites and see should they have demos available as well as lite versions on the extension you can install and try out. Commonly, if a commercial product doesn't have a simulated or a lite type, they'll at least use a video of someone while using product.
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How To Choose a Joomla Extension
How To Choose a Joomla Extension