Off-topic:
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So be so kind, and provide in your question all what you asked in comment. If you not do so, we can only guess about some information, which are essential ion preparation of answer.- For example, the following example, is based in guessing:
On-topic:
IN MWE below is assumed, that your document has two columns.
- In such document for table, which span both columns you should use
table* environment.
- Some table cells has very long text. For it is sensible to use column type which breaks text into multiple lines. Example of such column tapes are
p{<column width>}, or X and its derivatives from tabularx table environment (as is selected in MWE below).
- Numbers in tale can be simply and concise to write by employing
siunitx package.
\documentclass[twocolumn]{article}
\usepackage{booktabs, tabularx}
\newcolumntype{C}{>{\centering\arraybackslash}X}
\newcolumntype{L}{>{\raggedright\arraybackslash}X}
\NewExpandableDocumentCommand\mcC{O{1}m}
{\multicolumn{#1}{C}{#2}}
\NewExpandableDocumentCommand\mcL{O{1}m}
{\multicolumn{#1}{L}{#2}}
\usepackage{siunitx}
\usepackage{stfloats} % for positioning of figure* on the same page
\usepackage{lipsum}
\begin{document}
\lipsum[1]
\begin{table}[b]
\caption{hello2 testing}
\label{1234}
\small
\setlength\tabcolsep{4pt}
\begin{tabularx}{\linewidth}{l {5}{S[table-format=2.1(2),
separate-uncertainty]}
}
\toprule
Name
& \mcC{Reference}
& \mcC{S/A}
& \mcC{Advantages}
& \mcC{Disadvantages}
& \mcC{API} \
\midrule
Abcde (abcc)
& 43,50 & \mcL{There is value in the demanding of high data}
& \mcL{It do not thing any thing you can make better}
& \mcC{Abbccc}
& \mcC{Python, C++} \
\addlinespace
B & 69.8(95) & 93.6(36) & 86.9(84) & 91.5(45) & 94.9(54) \
C & 97.0(29) & 99.2(18) & 99.6(14) & 98.3(29) & 99.6(14) \
D & 97.8(31) & 95.3(31) & 96.2(25) & 92.4(33) & 97.5(30) \
E & 77.5(72) & 90.2(41) & 90.2(57) & 88.1(48) & 91.6(49) \
F & {88.0} & {95.1} & {94.1} & {93.5} & {96.5} \
\bottomrule
\end{tabularx}
\end{table*}
\lipsum[2-5]
\end{document}
It gives:

stripenvironment, from thecutedpackage (sttoolsbundle), to temporarily leave the two-column mode. – Bernard Mar 05 '21 at 17:16\resizeboxon tables (your image shows why!) put your long headings in a parbox or nested tabular so they are not on one line, and if necessary usetable*so it spans over both columns, – David Carlisle Mar 05 '21 at 17:31\documentclassand end\end{document}(you can usearticleclass for the example even if using a specific class in the real document – David Carlisle Mar 05 '21 at 17:33