Wordpress

Avantages

Without a doubt, the biggest thing about WordPress are all the plugins that are available. Whatever you end up wanting to do with your Wordpress website, there's a big chance that there's already a plugin for it, which not only allows you to perform complex operations without any coding knowledge, but provides you with additional tools to fully customise the setup.
With WordPress the sky is the limit to what you can do and its often a matter of being able to find plugins and tinkering with them until you've added a desired functionality.
Since it might not be fair to talk only about plugins of third parties, while reviewing the WordPress CMS (although they are a big reason it is so good), I'll also try and cover some of the things I like about the platform itself.
Firstly, it is an ever evolving one and there are constant updates. I remember when I first used WordPress and began editing and later building a few websites some 5 years ago. Back then the CMS was more basic and you would often need some coding skills to get around. Fast forward to today, themes and plugins have advanced greatly and there is far less need for actual coding - it's being done by third parties. WordPress themselves have done a great job at improving the CMS in terms of content editing capabilities for regular posts.

Inconvénients

The core of the CMS could be expanded more to include popular options you get with plugins. Third party plugins can sometimes slow down a website or conflict with one another due to coding incompatibilities. Because of this and the fact that WP can get cluttered with a bunch of plugins and you eventually end up with a backend that's hard to navigate, I think they should expand on the core a lot more than they have been.

Avantages

Wordpress offers the most options and built in plugins if you are willing to pay. With how broad the use of wordpress is there are also plenty of resources online to help you build and expand your webpage. You can edit your site and get it up and running in a matter of hours.

Inconvénients

When you are starting out on wordpress there are features and plugins are are only available at higher priced points. Unfortunately you have to pay for the entire year so there is not much flexibility in terms of trying things out for a short period of time before committing.

Avantages

I consider myself to be a tech savvy guy, but when it came to web design my creativity seemed to falter. WordPress provided me all the solutions I needed to build a website I felt would attract customers and allow my team and I to build a website that represents us, and how we see our company. It was ease of use like I hadn't experienced trying to code other websites, and to be perfectly honest I was disappointed when our website project had ended simply because I was enjoying interacting with the software so much.

Inconvénients

I can honestly say from my experience working with WordPress and past experience with other software that there really weren't any cons. The tools allow for "drag and drop" functionality which was huge for me as much of what I added were video or pictures of our products. Additionally, the suggestions provided by the software were great to have, and even better was the fact there are so many communities out there with people who use WordPress regularly and who are able to offer some great ideas on site improvements.

Avantages

Wordpress makes it very easy for editorial staff and / or your customers to create and manage their own content for their own websites, leaving only theme design & development and development of special business functionality up to you. The process of which is also helped by the vast amount of plugins available for the platform. It's easy and efficient to create custom themes & functionality for Wordpress based websites and support is never far away thanks to the massive adoption-base it has.

Inconvénients

The fact that Wordpress, at its core, still wants to be about blogging hinders its development. If it was reworked with the integration of custom content types & landing pages in mind, development of websites that aren't blogs (which is probably the majority of websites Wordpress is powering at this time) would go much easier.
Its underlying technologies, which feel like they're stuck in the days of PHP4, are also not nearly up-to-par with modern software development frameworks and environments. If you want to change the way a store-bought theme displays some values, you have to manually edit the theme's files, which you have to do over and over again if you update the theme, because Wordpress' hooks for software developers just won't cut it for most customisations.
Wordpress also doesn't have any concept of MVC-like (or any other) patterns for managing code & assets and it also lacks native support for any kind of build-system like grunt, gulp, or webpack.
In short: Wordpress is held back by its blogging roots and its resilience to acknowledging more modern approaches to web development.

Avantages

I love that you can use WordPress to accomplish almost anything related to building a website. Word press is a program that can out of the box build a fully function website or be modified to accomplish most tasks you normally have to spend time writing line after line of code. Its great having a program the you can acquire and use for free or nearly free that can do so much. Once you setup how you want WordPress to display your website you can easily create new content for your website with no more than few clicks. You can rearrange elements on your website with something as simple as drag and dropping if you want to. WordPress takes what would be hours of coding and cuts it down to minutes, but what really makes WordPress stand out is how easy it is to add functionality with plugins. It is so simple that to add a plugin you merely have to go to the plugin section that you can find right on the dashboard main screen and type what ever you are looking for into a search bar and then its as simple as picking what plugin bets meets your needs and there are literally 1000s plugins that you can choose from for any given need you my find your self wanting fulfilled.

Inconvénients

I am freelance Web Developer and from my perspective WordPress is probably the most changeable and easy to personalize program available for free that is easy to learn how to use, but if I had to say something negative the only thing I can say really is that on its own it can feel limited but like I said before. You can easily change how WordPress works by customizing with plugins that you can install will no more than a few clicks a little time spend familiarizing your self with how the plugin works. So even though WordPress may be limited to start with you can easily fix that by spend a few minutes adding the plugins you need.