Places for Online Chess

chess.com
> Out of all of these places, this place is by far one of the best ones. You might need accounts in order to actually play online. However, you might need to subscribe to chess.com with plans like gold, platinum, and diamond in order to access some exclusive, or unlimited features that could be important towards your chess improvement and mastery. They do have tactical puzzles you can solve, as well as a time-attack version of them known as "Puzzle Rush." Besides, you can also play with computers on this site, as well as friends. This site is known as the #1 site for chess, but not too easy to use.
lichess.org
> By far, this chess website is the easiest to use out of all of them, even easier to use than chess.com. This website has absolutely no ads that appear on your game, which is great because ads can be annoying. Also, the website is much cleaner than chess.com, and you can access features more easily through just one settings bar. Also, you already get a lot more features than chess.com! This page is open-source, which means that you can look at the source code for every feature of the page that's written in many languages, like Scala, Javascript, Python, Typescript, and, of course, HTML and CSS. You can also start a simultaneous exibition, where you can play many players at once. You can access multiple puzzles, as well as the site's variant of time-attack puzzles known as "Puzzle Storm."
There's also a page that's similar to lichess known as lidraughts.org where you can play British draughts, checkers, or other variants as well!
chess.cool
> This website is another website used for online chess, but it has features that are limited. You don't really need a subscription to access more features, unlike chess.com. You get an unlimited amount of chess games, as well as make and participate in an unlimited amount of chess tournaments. However, unlike the other two websites, the website isn't really that clean and animated, given that there are ads in the site. However, it is still good enough if you want to get into a quick game. The site does have puzzles, but they are only checkmate puzzles from one move to five moves to checkmate the opponent.
chesstempo.com
> This website is more of a training website, rather than either a website where you can play, or a balance of both training and playing games. Yes, you can still play games with others in this site, but the features in this chess website focus more on training and practice, which helps you improve. The website trains you on openings, middlegames, endgames, and tactics, as well as showing millions of games by multiple players in tournaments. Also, there's another feature that shows how well you compare against a grandmaster by your moves compared to the grandmaster's moves.

All of the following websites are free to at least play a game. Some might require accounts.

All of the chess diagrams were created on Apronus which are free for non-commercial use.